Edexcel IAL · Thinka 原創模擬試題

2024 Edexcel IAL Economics (YEC11) 模擬試題連答案詳解

Thinka Jun 2024 Cambridge International A Level-Style Mock — Economics (YEC11)

320 分450 分鐘2024
分析模擬試題
An original Thinka practice paper modelled on the structure and difficulty of the Jun 2024 Cambridge International A Level Economics (YEC11) paper. Not affiliated with or reproduced from Cambridge.

選擇題 (甲部 - Unit 1, 2, 3, 4)

Answer all 24 questions across the four units. Each question is worth 1 mark.
24 題目 · 24 分
題目 1 · 選擇題
1 分
The payoffs (in millions of dollars of profit) of two competing firms, Firm A and Firm B, choosing between a High Price strategy and a Low Price strategy are as follows: if both choose High Price, payoffs are (10, 10); if Firm A chooses High and Firm B chooses Low, payoffs are (2, 15); if Firm A chooses Low and Firm B chooses High, payoffs are (15, 2); if both choose Low Price, payoffs are (5, 5). In the absence of collusion, what is the Nash equilibrium outcome for Firm A and Firm B respectively?
  1. A.High Price, High Price
  2. B.Low Price, Low Price
  3. C.High Price, Low Price
  4. D.Low Price, High Price
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解題

To find the Nash equilibrium, we determine each firm's best response to the other's actions. If Firm B plays High Price, Firm A's best response is Low Price because 15 is greater than 10. If Firm B plays Low Price, Firm A's best response is Low Price because 5 is greater than 2. Thus, Low Price is a dominant strategy for Firm A. Similarly, if Firm A plays High Price, Firm B's best response is Low Price because 15 is greater than 10. If Firm A plays Low Price, Firm B's best response is Low Price because 5 is greater than 2. Thus, Low Price is also a dominant strategy for Firm B. The Nash equilibrium occurs where both players are playing their best responses simultaneously, which is (Low Price, Low Price).

評分準則

1 mark for the correct option (B). Reject all other options.
題目 2 · 選擇題
1 分
A central bank decides to raise its base interest rate. Which of the following is the most likely initial effect on the country's exchange rate and its aggregate demand (AD)?
  1. A.Exchange rate appreciates; Aggregate demand decreases
  2. B.Exchange rate appreciates; Aggregate demand increases
  3. C.Exchange rate depreciates; Aggregate demand decreases
  4. D.Exchange rate depreciates; Aggregate demand increases
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解題

An increase in interest rates attracts hot money inflows from foreign investors seeking higher yields on savings, which increases the demand for the domestic currency and causes its exchange rate to appreciate. Concurrently, higher interest rates raise the cost of borrowing and increase the incentive to save, which reduces household consumption and business investment, thereby leading to a decrease in aggregate demand (AD).

評分準則

1 mark for the correct option (A). Reject all other options.
題目 3 · 選擇題
1 分
Which of the following is most likely to accelerate the process of economic globalisation?
  1. A.An increase in average global tariff rates on manufactured goods
  2. B.A reduction in the real costs of containerised shipping and telecommunications
  3. C.The implementation of strict capital controls to limit foreign direct investment (FDI)
  4. D.A decline in the number of bilateral trade agreements signed between developing economies
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解題

Globalisation is driven by advancements in transport and technology that reduce the cost and time of moving goods, services, and assets across borders. A reduction in the real costs of containerised shipping and telecommunications directly lowers transactional and logistical barriers, thereby accelerating global economic integration. Protectionist policies like tariffs, capital controls, or fewer trade agreements act as barriers that slow globalisation.

評分準則

1 mark for the correct option (B). Reject all other options.
題目 4 · 選擇題
1 分
The Marshall-Lerner condition states that a depreciation of a currency will improve the current account balance of the balance of payments if:
  1. A.the sum of the price elasticities of demand for exports and imports is greater than 1
  2. B.the sum of the income elasticities of demand for exports and imports is less than 1
  3. C.the price elasticity of demand for exports is perfectly inelastic
  4. D.the marginal propensity to import is greater than the marginal propensity to save
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解題

The Marshall-Lerner condition states that a depreciation or devaluation of a currency will improve the current account balance only if the sum of the price elasticities of demand for exports and imports is greater than 1, represented mathematically as: \(|PED_x| + |PED_m| > 1\). If this condition is met, the positive volume effect of trade (selling more exports and buying fewer imports) will outweigh the negative price effect.

評分準則

1 mark for the correct option (A). Reject all other options.
題目 5 · 選擇題
1 分
On a production possibility frontier (PPF) diagram, a movement from a point inside the frontier to a point closer to or on the frontier represents:
  1. A.an increase in potential economic growth
  2. B.a reduction in the economy's productive capacity
  3. C.actual economic growth driven by a reduction in unemployed resources
  4. D.supply-side growth resulting from an increase in the labor force
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解題

A point inside the PPF represents inefficiency or unemployed resources. Moving closer to or onto the frontier indicates that the economy is employing its existing resources more fully, which constitutes actual economic growth. In contrast, potential economic growth (or an increase in productive capacity) is shown by an outward shift of the entire PPF curve.

評分準則

1 mark for the correct option (C). Reject all other options.
題目 6 · 選擇題
1 分
The price elasticity of demand for labour is likely to be more price inelastic if:
  1. A.labour costs represent a very high proportion of total production costs
  2. B.there are many close substitutes for labour, such as advanced capital machinery
  3. C.the price elasticity of demand for the final product being produced is highly price elastic
  4. D.it is difficult for a firm to substitute capital for labour in the short run
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解題

The demand for labour is more inelastic when firms cannot easily replace workers with capital or other inputs (non-substitutability). If capital cannot easily be substituted for labour in the short run, a rise in wages will not lead to a large reduction in employment, making the demand for labour inelastic. Conversely, if labour costs are a high proportion of total costs, if substitution is easy, or if the product demand is elastic, labour demand would be more elastic.

評分準則

1 mark for the correct option (D). Reject all other options.
題目 7 · 選擇題
1 分
A country produces only two goods: wheat and microchips. Due to a major breakthrough in automated chip-manufacturing technology, the maximum amount of microchips the country can produce doubles, while the maximum amount of wheat it can produce remains unchanged. Which of the following best describes the effect on the country's production possibility frontier (PPF)?
  1. A.The PPF shifts parallel outwards to the right for both goods
  2. B.The PPF pivots outwards along the axis representing microchips
  3. C.The PPF shifts parallel inwards to the left for both goods
  4. D.The PPF pivots outwards along the axis representing wheat
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解題

Since the technological advancement only increases efficiency in the production of microchips, the maximum possible output of microchips increases (the intercept on the microchips axis shifts outwards). However, because there is no technological change in wheat production, the maximum potential output of wheat remains unchanged (the intercept on the wheat axis is fixed). Consequently, the PPF pivots outwards from the fixed point on the wheat axis.

評分準則

1 mark for the correct option (B). Reject all other options.
題目 8 · 選擇題
1 分
Which of the following provides a behavioural economics explanation for why consumers might purchase an overpriced extended warranty on a consumer electronic device?
  1. A.Perfect information regarding the probability of the device breaking down
  2. B.The application of rational utility-maximising calculations across the product's lifespan
  3. C.Heuristics and loss aversion, leading to an overestimation of the likelihood and cost of product failure
  4. D.The elimination of asymmetric information between the retailer and the consumer
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解題

Traditional economic theory assumes rational agents with perfect information. Behavioural economics, however, highlights cognitive biases. Loss aversion describes the tendency of individuals to fear losses more than they value equivalent gains. Combined with heuristics (rules of thumb/mental shortcuts), consumers often overestimate the probability of a product breaking down and overpay for extended warranties to avoid the psychological pain of a potential future loss.

評分準則

1 mark for the correct option (C). Reject all other options.
題目 9 · 選擇題
1 分
Which of the following describes the efficiency of a firm operating in a monopolistically competitive market in long-run equilibrium?
  1. A.Both allocative and productive efficiency
  2. B.Productive efficiency but not allocative efficiency
  3. C.Allocative efficiency but not productive efficiency
  4. D.Neither allocative nor productive efficiency
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解題

In the long run, a monopolistically competitive firm maximizes profit where \(MR = MC\). Because the firm faces a downward-sloping demand curve, price (\(P\)) is greater than marginal cost (\(MC\)) at this output, meaning allocative efficiency is not achieved. Furthermore, the firm produces at an output level where average cost (\(AC\)) is falling and is above its minimum point (due to the tangency of the downward-sloping demand curve with the average total cost curve), meaning it does not achieve productive efficiency. Hence, it exhibits neither allocative nor productive efficiency.

評分準則

1 mark for identifying option D as the correct answer. Reject all other options.
題目 10 · 選擇題
1 分
An economy is experiencing high inflation and a large current account deficit on its balance of payments. The central bank decides to raise its base interest rate. What is the most likely immediate impact of this policy rate increase on the exchange rate and domestic aggregate demand (AD)?
  1. A.Exchange rate appreciates; AD decreases.
  2. B.Exchange rate depreciates; AD decreases.
  3. C.Exchange rate appreciates; AD increases.
  4. D.Exchange rate depreciates; AD increases.
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解題

Raising the base interest rate attracts hot money inflows from foreign investors seeking higher returns on their savings, which increases the demand for the domestic currency and leads to an appreciation of the exchange rate. Simultaneously, higher interest rates increase the cost of borrowing and the incentive to save, reducing consumer spending and business investment, which decreases domestic aggregate demand (AD).

評分準則

1 mark for identifying option A as the correct answer. Reject all other options.
題目 11 · 選擇題
1 分
A multinational corporation (MNC) uses transfer pricing to minimise its global corporate tax liability. Which of the following best describes this practice?
  1. A.Selling goods between subsidiaries in different countries at prices designed to shift profits to low-tax jurisdictions.
  2. B.Charging different prices to consumers in different countries based on their price elasticity of demand.
  3. C.Colluding with local firms to fix retail prices below the market equilibrium.
  4. D.Charging prices below cost in a new market to eliminate local competitors and gain monopoly power.
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解題

Transfer pricing involves setting prices for transactions (goods, services, or intellectual property) between subsidiaries of the same multinational company located in different countries. By inflating the prices of inputs sold by a subsidiary in a low-tax country to one in a high-tax country, or underpricing exports from high-tax countries, the MNC can shift its taxable profits to the low-tax jurisdiction, reducing its overall global tax liability.

評分準則

1 mark for identifying option A as the correct answer. Reject all other options.
題目 12 · 選擇題
1 分
Following a depreciation of its currency, a country's trade balance initially deteriorates before eventually improving. Which of the following explains this 'J-curve' effect?
  1. A.Export and import demands are highly price elastic in the short run but become inelastic in the long run.
  2. B.Export and import demands are price inelastic in the short run due to pre-existing contracts, but become more elastic in the long run.
  3. C.The Marshall-Lerner condition is satisfied in the short run but not in the long run.
  4. D.Foreign consumers immediately increase their demand for the country's exports, while domestic consumers take longer to adjust.
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解題

In the short run, consumers and firms are bound by pre-existing trade contracts and habits, making the price elasticity of demand for both exports and imports highly inelastic. Since the price elasticity sum is less than 1, the Marshall-Lerner condition is not satisfied, and the depreciation causes the trade deficit to widen initially. Over time, as contracts expire and agents find substitutes, demand becomes more elastic, satisfying the Marshall-Lerner condition and improving the trade balance.

評分準則

1 mark for identifying option B as the correct answer. Reject all other options.
題目 13 · 選擇題
1 分
Which of the following would be most likely to cause an increase in an economy's potential rate of economic growth?
  1. A.A reduction in the central bank's policy interest rate.
  2. B.An increase in government spending on unemployment benefits.
  3. C.An increase in net inward migration of skilled workers.
  4. D.A depreciation of the exchange rate.
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解題

Potential economic growth is determined by supply-side factors that increase the productive capacity of the economy (shifting the Long-Run Aggregate Supply, LRAS, curve to the right). An increase in net inward migration of skilled workers increases both the quantity and quality of the labor force, expanding the economy's productive potential. Other options primarily affect aggregate demand (actual growth) rather than the long-run productive capacity.

評分準則

1 mark for identifying option C as the correct answer. Reject all other options.
題目 14 · 選擇題
1 分
An economy produces only two goods: capital goods and consumer goods. If the economy is currently operating at a point inside its Production Possibility Frontier (PPF), which of the following statements must be true?
  1. A.It is impossible to produce more consumer goods without reducing the production of capital goods.
  2. B.The economy is experiencing allocative efficiency but productive inefficiency.
  3. C.More of both goods can be produced by utilizing unemployed or underemployed resources.
  4. D.The opportunity cost of increasing the production of capital goods is constant.
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解題

A point inside the PPF indicates that the economy is operating with unemployed or inefficiently allocated resources (productive inefficiency). Consequently, the economy can increase the production of both consumer goods and capital goods simultaneously by employing these idle resources, meaning there is no opportunity cost associated with increasing production up to the frontier.

評分準則

1 mark for identifying option C as the correct answer. Reject all other options.
題目 15 · 選擇題
1 分
In a monopsony labor market, a trade union successfully negotiates a national minimum wage that is higher than the current monopsony wage rate but lower than the wage rate that would exist in a perfectly competitive labor market. What is the most likely effect on employment and the wage rate in this market?
  1. A.Employment decreases and the wage rate increases.
  2. B.Employment increases and the wage rate increases.
  3. C.Employment decreases and the wage rate decreases.
  4. D.Employment remains unchanged and the wage rate increases.
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解題

A monopsonist employer faces an upward-sloping labor supply curve, meaning the marginal cost of labor (\(MCL\)) is above the average cost of labor (\(ACL\)). The monopsonist restricts employment to where \(MCL = MRP_L\) and pays a lower wage than in a competitive market. When a minimum wage is introduced above the monopsony wage (but below the competitive level), the employer becomes a wage-taker up to the supply curve. The \(MCL\) becomes flat (horizontal) at the minimum wage level. Since \(MCL\) is now lower than the original \(MCL\) for those units of labor, the firm has an incentive to expand employment. Thus, both employment and the wage rate increase.

評分準則

1 mark for identifying option B as the correct answer. Reject all other options.
題目 16 · 選擇題
1 分
The government decides to impose an indirect tax on a good. Under which of the following conditions will consumer surplus decrease by the greatest amount, assuming all other factors remain constant?
  1. A.Price elasticity of demand is perfectly elastic.
  2. B.Price elasticity of demand is highly inelastic.
  3. C.Price elasticity of supply is perfectly inelastic.
  4. D.Price elasticity of demand is highly elastic.
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解題

The incidence of an indirect tax depends on the relative price elasticities of demand and supply. When demand is highly inelastic (consumers are highly unresponsive to price changes), the majority of the tax burden is passed on to the consumer in the form of a higher retail price. This leads to a significant increase in the consumer price and consequently the largest reduction in consumer surplus. If demand were perfectly elastic, price to consumers wouldn't change at all, leaving consumer surplus unchanged. If supply were perfectly inelastic, the producer bears the entire tax, and the consumer price does not change.

評分準則

1 mark for identifying option B as the correct answer. Reject all other options.
題目 17 · 選擇題
1 分
Which of the following is most likely to occur in a highly contestable market where there are no barriers to entry or exit?
  1. A.Existing firms will earn supernormal profits in the long run.
  2. B.Existing firms will set prices where marginal revenue equals marginal cost (\(MR = MC\)) to maximise profits.
  3. C.Existing firms will set prices at a level that results in only normal profits (\(AR = AC\)) to deter hit-and-run entry.
  4. D.Productive inefficiency will increase due to a lack of competitive pressures.
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解題

In a highly contestable market, the threat of 'hit-and-run' entry by new firms prevents existing firms from charging high prices and earning supernormal profits in the long run. To deter new entrants, existing firms will set their prices where average revenue equals average cost (\(AR = AC\)), earning only normal profits. If they charged a price above this, new firms would enter, take the profits, and exit easily when prices fell.

評分準則

1 mark for the correct option (C). Correctly identifying that limit pricing or normal profit pricing occurs to prevent hit-and-run entry.
題目 18 · 選擇題
1 分
Which of the following is a key driver of globalisation that has led to an increase in foreign direct investment (FDI)?
  1. A.The imposition of higher tariff barriers on imported raw materials.
  2. B.A reduction in the costs of containerisation and international transport.
  3. C.The introduction of strict capital controls by developing economies.
  4. D.An increase in the appreciation of the domestic currency of the host nation.
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解題

Globalisation has been accelerated by significant advancements in technology and transport infrastructure, notably containerisation. Lower containerisation and transport costs make it cheaper and more efficient for multinational corporations (MNCs) to manage global supply chains and invest in overseas facilities (FDI).

評分準則

1 mark for the correct option (B). Identifying that reduced containerisation and transport costs facilitate globalisation and FDI.
題目 19 · 選擇題
1 分
The Marshall-Lerner condition states that a depreciation of a country's currency will improve its balance of trade in goods and services if:
  1. A.the sum of the price elasticities of demand for exports and imports is greater than 1.
  2. B.the sum of the income elasticities of demand for exports and imports is less than 1.
  3. C.both exports and imports are price inelastic.
  4. D.domestic inflation is higher than the rate of currency depreciation.
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解題

The Marshall-Lerner condition stipulates that a currency depreciation or devaluation will improve the trade balance if the absolute sum of the price elasticities of demand for exports and imports is greater than 1 (\(|PED_x + PED_m| > 1\)). This ensures the quantity effects of changes in trade prices outweigh the price effects.

評分準則

1 mark for the correct option (A). Correctly identifying the formulaic condition for the Marshall-Lerner condition.
題目 20 · 選擇題
1 分
An economy is experiencing a high rate of inflation. The central bank decides to increase the base interest rate. Which of the following is a likely transmission channel through which this policy reduces aggregate demand?
  1. A.Household saving decreases, leading to an increase in consumption.
  2. B.The exchange rate depreciates, increasing the net export component of aggregate demand.
  3. C.Asset prices rise, leading to a positive wealth effect that increases investment.
  4. D.Cost of borrowing increases, leading to a reduction in discretionary income for households with variable-rate mortgages.
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解題

An increase in the base interest rate increases commercial banks' borrowing rates. This raises the monthly payments for households with variable-rate mortgages, reducing their discretionary income and leading to lower consumption, which in turn reduces aggregate demand.

評分準則

1 mark for the correct option (D). Understanding how higher interest rates reduce household discretionary income via variable-rate mortgages.
題目 21 · 選擇題
1 分
An economy produces two goods: consumer goods and capital goods. Which of the following would cause a parallel outward shift of the production possibility frontier (PPF)?
  1. A.A reallocation of existing resources from the production of consumer goods to capital goods.
  2. B.An increase in the division of labour and specialisation across all industries in the economy.
  3. C.A decrease in the rate of unemployment, bringing previously idle resources into production.
  4. D.An increase in the demand for consumer goods relative to capital goods.
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解題

An outward shift of the PPF represents an increase in the productive capacity of the economy. An increase in the division of labour and specialisation increases the productivity of labour across all industries, expanding the maximum potential output of both consumer and capital goods.

評分準則

1 mark for the correct option (B). Distinguishing between movements along the PPF, non-parallel/parallel shifts, and shifts caused by productivity changes vs. utilization of idle resources.
題目 22 · 選擇題
1 分
In a monopsony labour market, a profit-maximising employer will hire workers up to the point where:
  1. A.The marginal revenue product of labour (\(MRPL\)) is equal to the marginal cost of labour (\(MCL\)), and pay a wage equal to the marginal cost of labour.
  2. B.The marginal revenue product of labour (\(MRPL\)) is equal to the marginal cost of labour (\(MCL\)), and pay a wage determined by the average cost of labour (\(ACL\)) supply curve at that level of employment.
  3. C.The average cost of labour (\(ACL\)) is equal to the marginal revenue product of labour (\(MRPL\)), and pay a wage equal to the average cost of labour.
  4. D.The marginal revenue product of labour (\(MRPL\)) is equal to the average cost of labour (\(ACL\)), and pay a wage determined by the marginal cost of labour.
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解題

A monopsonist maximizes profit where the marginal cost of hiring an additional worker equals the marginal revenue product of labour (\(MCL = MRPL\)). However, because the monopsonist faces an upward-sloping supply curve of labour (average cost of labour, \(ACL\)), it only needs to pay the wage rate required to attract that quantity of workers, which is found on the \(ACL\) curve.

評分準則

1 mark for the correct option (B). Accurately describing the hiring decision (\(MCL = MRPL\)) and wage-setting behavior of a monopsonist.
題目 23 · 選擇題
1 分
The government imposes a specific indirect tax on a good. The price paid by consumers increases by the full amount of the tax. This outcome suggests that the price elasticity of demand (\(PED\)) for the good is:
  1. A.perfectly elastic.
  2. B.perfectly inelastic.
  3. C.unitary elastic.
  4. D.relatively elastic.
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解題

When demand is perfectly inelastic (\(PED = 0\)), consumers are completely unresponsive to price changes. Thus, producers can pass 100% of the indirect tax burden onto consumers in the form of a higher price, without losing any sales volume.

評分準則

1 mark for the correct option (B). Correctly identifying that consumers bear the entire tax burden when price elasticity of demand is perfectly inelastic.
題目 24 · 選擇題
1 分
Which of the following situations best describes or illustrates an economy experiencing a negative output gap?
  1. A.The economy's actual level of GDP is operating above its trend rate of growth.
  2. B.The equilibrium national income is to the right of the long-run aggregate supply (LRAS) curve.
  3. C.The economy is operating on its production possibility frontier (PPF).
  4. D.The rate of cyclical unemployment is high, and there is significant spare capacity in the economy.
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解題

A negative output gap occurs when actual GDP is below potential GDP, meaning the economy has spare capacity and idle resources. This is typically characterized by high levels of cyclical unemployment and underutilized factory capacity.

評分準則

1 mark for the correct option (D). Understanding that a negative output gap involves actual GDP being below potential GDP, characterized by high unemployment and spare capacity.

Unit 1 & 2 乙部 (Short Response)

Answer all 10 short response and diagrammatic questions across Units 1 and 2. Each question is worth 4 marks.
10 題目 · 40 分
題目 1 · Diagram / Short Written Response
4 分
Explain the concept of irrational consumer behaviour using the idea of 'anchoring'.
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解題

Anchoring occurs when consumers use an initial price or value (the anchor) as a reference point to judge all subsequent prices, regardless of its intrinsic accuracy. For example, if a clothing retailer lists a jacket at a 'recommended retail price' of $100 but offers it on sale for $60, the consumer uses $100 as the anchor. They perceive the purchase as a major saving of $40, even though the jacket might only be worth $40 in terms of actual utility and cost. This distorts their rational calculation of utility relative to cost, leading to an irrational purchase decision.

評分準則

1 mark for defining anchoring as relying on the first piece of information offered. 1 mark for explaining how this leads to irrational choices (by distorting the consumer's perception of value). 2 marks for a relevant real-world application (e.g., recommended retail prices vs. discount prices showing how the consumer's rational calculation of utility is biased).
題目 2 · Diagram / Short Written Response
4 分
With the aid of a diagram, explain how a government subsidy on public transport can correct a market failure caused by positive externalities of consumption.
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解題

A subsidy lowers the cost of production for public transport providers, shifting the MPC (supply) curve downwards to MPC - subsidy. This reduces the price from Pm to Ps and increases consumption from the free market level Qm (where MPB = MPC) to the socially optimal level Qs (where MSB = MSC). This corrects the underconsumption market failure and eliminates the welfare loss (deadweight loss) triangle.

評分準則

2 marks for diagram showing: MSB > MPB, original market equilibrium (Qm, Pm) and social optimum (Qs, Ps) with a welfare loss triangle (1 mark); and the MPC curve shifting down to MPC - subsidy, increasing quantity to Qs (1 mark). 2 marks for explanation: 1 mark for explaining that a subsidy lowers prices and encourages greater consumption; 1 mark for explaining that consumption reaches the socially optimal level Qs, eliminating the welfare loss.
題目 3 · Diagram / Short Written Response
4 分
In a local market, the price of brand X tea increases from $3.00 to $3.30. As a result, the weekly quantity demanded of brand Y tea increases from 5,000 packets to 6,000 packets. Calculate the cross elasticity of demand (XED) between brand X and brand Y tea, and state the economic relationship between these two goods.
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解題

Percentage change in quantity demanded of brand Y = \(\frac{6,000 - 5,000}{5,000} \times 100 = +20\%\). Percentage change in price of brand X = \(\frac{3.30 - 3.00}{3.00} \times 100 = +10\%\). Cross elasticity of demand (XED) = \(\frac{\% \Delta \text{Qd of Y}}{\% \Delta \text{Price of X}} = \frac{+20\%}{+10\%} = +2.0\). Since the XED is positive, the two brands of tea are substitute goods.

評分準則

1 mark for calculating percentage change in quantity demanded of Y (+20%). 1 mark for calculating percentage change in price of X (+10%). 1 mark for correct XED calculation of +2 or 2.0. 1 mark for correctly stating that the goods are substitutes.
題目 4 · Diagram / Short Written Response
4 分
An economy's Consumer Price Index (CPI) is 125.0 in Year 1 and 131.25 in Year 2. Calculate the annual rate of inflation between Year 1 and Year 2. Show your workings.
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解題

To calculate the rate of inflation, use the formula: \(\text{Inflation Rate} = \frac{\text{CPI}_{\text{Year 2}} - \text{CPI}_{\text{Year 1}}}{\text{CPI}_{\text{Year 1}}} \times 100\). Substituting the values: \(\frac{131.25 - 125.0}{125.0} \times 100 = \frac{6.25}{125.0} \times 100 = 5\%\).

評分準則

1 mark for identifying the absolute increase in CPI (6.25). 2 marks for showing full correct workings, i.e., dividing the increase by the initial Year 1 CPI and multiplying by 100. 1 mark for the correct final answer of 5% (or 5).
題目 5 · Diagram / Short Written Response
4 分
In an economy, the marginal propensity to consume (MPC) is 0.75 and the marginal propensity to tax (MPT) is 0.15. Calculate the value of the multiplier and state the total increase in national income if investment increases by $60 million.
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解題

First, find the marginal propensity to save (MPS): \(\text{MPS} = 1 - \text{MPC} = 1 - 0.75 = 0.25\). In this economy, the marginal propensity to withdraw (MPW) is \(\text{MPS} + \text{MPT} = 0.25 + 0.15 = 0.40\). The multiplier (k) is \(k = \frac{1}{\text{MPW}} = \frac{1}{0.40} = 2.5\). The total increase in national income (\(\Delta Y\)) is \(\Delta Y = k \times \Delta I = 2.5 \times \$60 \text{ million} = \$150 \text{ million}\).

評分準則

1 mark for calculating MPS as 0.25 or MPW as 0.40. 1 mark for the correct multiplier formula \(1/\text{MPW}\). 1 mark for calculating the correct multiplier of 2.5. 1 mark for calculating the correct total increase in national income of $150 million.
題目 6 · Diagram / Short Written Response
4 分
Explain how a central bank's decision to increase its base interest rate can reduce demand-pull inflation.
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解題

An increase in the base rate is passed on by commercial banks as higher interest rates on loans, mortgages, and savings. This increases the cost of borrowing for consumers and firms, discouraging discretionary spending and investment. It also increases the opportunity cost of spending, encouraging saving. As a result, consumer expenditure (C) and investment (I) fall, shifting the aggregate demand (AD) curve to the left, which reduces demand-pull inflationary pressure.

評分準則

1 mark for identifying the transmission mechanism (higher cost of borrowing / higher reward for saving). 1 mark for explaining the reduction in consumer spending (C) or investment (I). 1 mark for linking this to a reduction / shift left in Aggregate Demand (AD). 1 mark for explaining how this reduces demand-pull inflationary pressure on the price level.
題目 7 · Diagram / Short Written Response
4 分
Define producer surplus. With the aid of a supply and demand diagram, explain the effect of a rightward shift in the demand curve on producer surplus.
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解題

Producer surplus is represented by the area below the market price and above the supply curve. When demand shifts to the right (from D1 to D2), the equilibrium price rises from P1 to P2, and the equilibrium quantity increases from Q1 to Q2. Because of the higher price and larger quantity sold, the area representing producer surplus expands, showing an increase in producer welfare.

評分準則

1 mark for a precise definition of producer surplus. 1 mark for a diagram showing the initial producer surplus area. 1 mark for a diagram showing the demand shift to the right, leading to a higher equilibrium price and quantity. 1 mark for showing/explaining the resulting increase in the producer surplus area.
題目 8 · Diagram / Short Written Response
4 分
Explain how a depreciation of a country's currency can improve its current account balance on the Balance of Payments, assuming the Marshall-Lerner condition holds.
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解題

Currency depreciation lowers the foreign-currency price of exports, making them more competitive, and raises the domestic-currency price of imports, making them less attractive. Assuming the Marshall-Lerner condition holds (\(|\text{PED}_x + \text{PED}_m| > 1\)), the demand for exports and imports is sufficiently price elastic. This ensures that the quantity changes (higher volume of exports, lower volume of imports) outweigh the price changes, leading to an increase in total export revenue and a decrease in total import spending, which improves the current account balance.

評分準則

1 mark for explaining that depreciation makes exports cheaper and imports more expensive. 1 mark for explaining the volume effect (export volumes rise, import volumes fall). 1 mark for defining or explaining the Marshall-Lerner condition (the sum of PED of exports and imports is greater than 1). 1 mark for explaining that under this condition, the overall trade value balance improves (export revenue increases relative to import spending).
題目 9 · Short Response
4 分
The table below shows the average monthly income of consumers in Country X and the quantity of premium organic coffee packs demanded per month. Average Monthly Income ($3,000 -> Quantity Demanded: 120 packs; Average Monthly Income $3,600 -> Quantity Demanded: 168 packs). Calculate the Income Elasticity of Demand (YED) for premium organic coffee when average monthly income increases from $3,000 to $3,600. State whether premium organic coffee is a normal good or an inferior good.
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解題

To calculate the Income Elasticity of Demand (YED): 1. Calculate the percentage change in quantity demanded (% Change in Qd) = ((168 - 120) / 120) * 100 = 40%. 2. Calculate the percentage change in income (% Change in Y) = ((3,600 - 3,000) / 3,000) * 100 = 20%. 3. Calculate YED = % Change in Qd / % Change in Y = 40% / 20% = +2.0. 4. Since the YED is positive (+2.0), premium organic coffee is a normal good (specifically, a luxury normal good as YED > 1).

評分準則

1 mark for the correct YED formula. 1 mark for correct calculation of % changes (Qd is 40% and Income is 20%). 1 mark for correct final value of +2.0 (accept 2). 1 mark for identifying it as a normal good (or luxury good) with correct justification based on the positive sign.
題目 10 · Short Response
4 分
An economy has the following marginal propensities to withdraw: Marginal propensity to save (MPS) = 0.15, Marginal rate of tax (MRT) = 0.20, and Marginal propensity to import (MPM) = 0.15. Calculate the value of the multiplier for this economy and explain how an increase in government spending would affect national income.
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解題

1. Calculate the marginal propensity to withdraw (MPW): MPW = MPS + MRT + MPM = 0.15 + 0.20 + 0.15 = 0.50. 2. Calculate the multiplier (k): k = 1 / MPW = 1 / 0.50 = 2. 3. Explain the effect: An increase in government spending is an injection into the circular flow. With a multiplier of 2, the final increase in national income will be twice as large as the initial injection of government spending.

評分準則

100% correct formula: Multiplier = 1 / MPW or 1 / (MPS + MRT + MPM). 1 mark for calculating MPW = 0.50. 1 mark for correct final multiplier value of 2. 1 mark for explaining that national income will increase by a larger (specifically double) amount due to the multiplier effect.

Unit 1 & 2 部分 C (Data Response)

Answer all questions in Section C based on the provided source booklets. Marks range from 2 to 14.
10 題目 · 66.39999999999999 分
題目 1 · Data Response Analysis
6.8 分
Extract A: In 2023, the government of Zephyria introduced a 20% excise tax on sugar-sweetened beverages to combat rising childhood obesity. Within twelve months, sales of these beverages fell by 15%, while government tax revenue increased by $45 million. Opponents argue that the tax disproportionately hurts lower-income families who allocate a larger share of their budget to these drinks. With reference to Extract A, analyze the likely impact of the 20% excise tax on consumer surplus and government tax revenue in Zephyria.
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解題

1. Impact on Consumer Surplus: An excise tax increases the costs of production for firms, shifting the market supply curve vertically upwards from \(S_1\) to \(S_{tax}\). This increases the equilibrium price paid by consumers and decreases the quantity demanded from \(Q_1\) to \(Q_2\). Consumer surplus, defined as the difference between consumers' willingness to pay and the market price, falls due to the higher price and lower consumption levels. 2. Impact on Government Tax Revenue: Tax revenue is calculated as the tax per unit multiplied by the quantity of units sold after the tax has been implemented. Because the percentage change in quantity demanded (-15%) is less than the percentage change in the tax/price (20%), the demand for sugar-sweetened beverages is price-inelastic (\(PED < 1\)). This allows the government to generate a significant amount of revenue, which increased by $45 million as detailed in Extract A.

評分準則

Knowledge: Up to 2 marks for defining consumer surplus and explaining how an indirect tax affects supply and market equilibrium. Application: Up to 2 marks for applying relevant data from Extract A (the 20% tax rate, the 15% fall in sales, and the $45 million tax revenue increase). Analysis: Up to 2.8 marks for explaining the mechanism through which the supply shift raises the consumer price and reduces consumer surplus, alongside a clear explanation of how inelastic demand results in high tax revenue.
題目 2 · Data Response Analysis
6.8 分
Figure 1: Global Lithium Market (2022-2023). Supply disruption in South American salt flats decreases lithium raw material exports by 30%. Demand for electric vehicle (EV) batteries continues to grow steadily. With reference to Figure 1, explain the impact of this supply disruption on the equilibrium price and quantity of lithium-ion batteries.
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解題

1. Shift in Supply: Lithium is a primary raw material used in the manufacturing of EV batteries. A 30% reduction in global exports represents a significant increase in production costs or a raw material shortage for battery manufacturers. This shifts the market supply curve for lithium-ion batteries to the left, from \(S_1\) to \(S_2\). 2. Adjustment to New Equilibrium: At the original equilibrium price \(P_1\), a shortage (excess demand) occurs because the quantity demanded exceeds the new quantity supplied. This shortage signals producers to raise prices. As the price increases from \(P_1\) to \(P_2\), there is a contraction along the demand curve. The market settles at a higher equilibrium price \(P_2\) and a lower equilibrium quantity \(Q_2\).

評分準則

Knowledge: Up to 2 marks for identifying that a supply disruption shifts the supply curve to the left and explaining the concept of market equilibrium. Application: Up to 2 marks for referencing the specific context from Figure 1 (the 30% raw material export decrease and its relation to EV battery production). Analysis: Up to 2.8 marks for detailing the price mechanism process, including the shortage at the original price, the upward pressure on price, and the final impact on equilibrium price and quantity.
題目 3 · Data Response Analysis
6.8 分
Extract B: In response to inflation reaching a 10-year high of 8.5%, the Central Bank of Valeria raised its benchmark interest rate from 1.5% to 4.75% over a nine-month period. While this aimed to cool the overheated economy, business groups expressed deep concern about the rising cost of borrowing, pointing to a projected 12% drop in private investment. Meanwhile, consumer confidence has fallen, and retail sales have flattened. With reference to Extract B, analyze the likely effects of the Central Bank of Valeria's decision to increase interest rates on the country's unemployment rate and investment levels.
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解題

1. Effect on Investment: Raising the interest rate from 1.5% to 4.75% increases the cost of borrowing for businesses. This reduces the expected rate of return on capital investment projects, making fewer projects commercially viable. Consequently, private investment is projected to decline by 12%. 2. Effect on Unemployment: Investment is a component of Aggregate Demand \(AD = C + I + G + (X-M)\). A reduction in investment, combined with weaker consumption (due to falling consumer confidence and flat retail sales), shifts the AD curve to the left, reducing real GDP. Since labor is a derived demand, the reduction in national output leads firms to lay off workers, increasing cyclical unemployment.

評分準則

Knowledge: Up to 2 marks for explaining how interest rates affect borrowing costs and defining the derived demand for labor. Application: Up to 2 marks for utilizing figures from Extract B (inflation at 8.5%, interest rate increase from 1.5% to 4.75%, and a 12% drop in investment). Analysis: Up to 2.8 marks for explaining the economic transmission mechanism from higher interest rates to reduced investment, a leftward shift in Aggregate Demand, and a subsequent rise in cyclical unemployment.
題目 4 · Data Response Analysis
6.8 分
Extract C: A retail study revealed that when energy-efficient washing machines were placed next to high-end premium models priced at $1,500, consumers perceived the $900 energy-efficient model as a bargain, even though standard models cost only $500. Furthermore, when utility bills included a comparison showing that '80% of your neighbors use energy-saving appliances,' local sales of eco-friendly models surged by 22%. With reference to Extract C, analyze how 'anchoring' and 'social norms' might explain consumer purchasing decisions for energy-efficient appliances.
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解題

1. Anchoring Bias: Anchoring is a cognitive bias where individuals rely heavily on the first piece of information offered (the anchor) when making decisions. In Extract C, the premium price of $1,500 acts as the anchor. When compared to this high price, the $900 energy-efficient model is perceived as high value and a bargain, even though it is significantly more expensive than the standard $500 model. 2. Social Norms: Social norms are the unwritten rules of behavior that are considered acceptable in a community. Showing consumers that '80% of your neighbors use energy-saving appliances' creates social pressure and a desire to conform. This positive nudge encourages households to adopt the same behavior, resulting in a 22% surge in sales.

評分準則

Knowledge: Up to 2 marks for defining anchoring and social norms within behavioral economics. Application: Up to 2 marks for referencing specific details from Extract C (the $1,500, $900, and $500 price points, the 80% neighbor comparison, and the 22% sales surge). Analysis: Up to 2.8 marks for explaining how these behavioral biases lead consumers to make choices that deviate from traditional utility-maximizing economic models.
題目 5 · Data Response Evaluation
6.8 分
Figure 2: Economic Indicators for Country Y (2023). Real GDP per Capita Growth: +4.2%; Gini Coefficient: 0.58 (up from 0.52); Air Quality Index: 'Unhealthy' (particulate matter increased by 25%); Access to clean drinking water: Decreased by 4%. With reference to Figure 2, evaluate the usefulness of using Gross Domestic Product (GDP) per capita as the primary measure of living standards in Country Y.
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解題

1. Usefulness of GDP per capita: An increase of 4.2% in real GDP per capita indicates that the average output and income per person have grown, which generally allows for greater consumption of goods and services and provides higher tax revenues to fund public infrastructure. 2. Evaluation of Limitations: GDP per capita fails to capture the distribution of income. The rise in the Gini coefficient from 0.52 to 0.58 shows that inequality has increased, suggesting that the benefits of growth are concentrated among a small wealthy group and the average citizen may not be better off. Additionally, it ignores negative externalities; a 25% increase in particulate air pollution and a 4% fall in clean water access directly harm health and quality of life, which are critical components of living standards not recorded in GDP figures.

評分準則

Knowledge: Up to 2 marks for explaining the concept of GDP per capita and how it is used to measure living standards. Application: Up to 2 marks for using specific data points from Figure 2 (4.2% growth, Gini coefficient rising to 0.58, 25% air pollution increase, and 4% drop in water access). Analysis & Evaluation: Up to 2.8 marks for analyzing and evaluating the limitations of GDP per capita, explaining why inequality and negative externalities create a divergence between GDP growth and actual living standards.
題目 6 · Data Response Analysis
6.8 分
Extract E: The government of Eldoria announced an infrastructure development plan injecting $500 million into the economy. At the same time, due to a shortage of domestic steel and technology, Eldorian firms increased import spending on capital equipment by $350 million. With reference to Extract E, analyze the net impact of these transactions on the equilibrium level of national income in Eldoria, using the concept of the circular flow of income.
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解題

1. Circular Flow of Income: Injections (J) represent spending on domestic output from sources other than domestic consumers, consisting of Investment, Government spending, and Exports. Leakages (W) represent income that is withdrawn from the domestic flow, consisting of Savings, Taxes, and Imports. 2. Analysis of the Net Impact: The $500 million spent on infrastructure is a direct government injection (\(G\)). The $350 million spent on foreign steel and technology is an import leakage (\(M\)). Because injections (\(G = 500\) million) exceed leakages (\(M = 350\) million), there is a net injection of $150 million into the circular flow (\(J > W\)). This positive net injection will trigger a multiplier effect, leading to a larger final increase in Eldoria's equilibrium national income.

評分準則

Knowledge: Up to 2 marks for defining injections and leakages in the circular flow of income, and explaining the condition for equilibrium national income. Application: Up to 2 marks for extracting the government spending injection ($500 million) and the import leakage ($350 million) from Extract E. Analysis: Up to 2.8 marks for calculating the net injection ($150 million) and explaining how this leads to a multiplied expansion of the equilibrium national income.
題目 7 · Data Response Analysis
6.8 分
Extract F: Following a cut in domestic interest rates, the Valerican Dollar (VD) depreciated by 12% against major trading currencies. Valerica's main exports are price-sensitive agricultural goods, while its imports are largely essential fossil fuels, which have price-inelastic demand. With reference to Extract F, analyze how this depreciation is likely to affect Valerica's current account balance in the short run and long run.
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解題

1. Short-Run Impact (J-Curve): A depreciation of the VD makes imports more expensive in terms of local currency and exports cheaper to foreign buyers. In the short run, the volume of imports (essential fossil fuels) is highly price-inelastic (\(PED < 1\)), as consumers and firms cannot quickly switch to alternatives. This causes the total import spending to rise. Combined with fixed export contracts, this causes the current account balance to worsen initially. 2. Long-Run Impact (Marshall-Lerner Condition): Over time, the Marshall-Lerner condition (\(PED_X + PED_M > 1\)) is more likely to be satisfied. In the long run, Valerican agricultural exports are price-sensitive (elastic), meaning foreign buyers will significantly increase their quantity demanded. As export revenues rise and import volumes contract, the current account balance will improve, creating the classic J-curve shape.

評分準則

Knowledge: Up to 2 marks for defining currency depreciation and explaining the J-curve effect and the Marshall-Lerner condition. Application: Up to 2 marks for utilizing context from Extract F (12% depreciation, price-sensitive agricultural exports, inelastic fossil fuel imports). Analysis: Up to 2.8 marks for explaining the detailed transition from short-run worsening (inelastic demand for imports) to long-run current account improvement (elastic demand for exports).
題目 8 · Data Response Analysis
6.8 分
Figure 3: The Labour Market in the Retail Sector. Equilibrium market wage: $10 per hour; Proposed national minimum wage: $14 per hour; Price elasticity of demand for retail labour: Elastic (PED > 1). With reference to Figure 3, analyze the likely impact of the proposed national minimum wage of $14 per hour on employment levels in the retail sector.
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解題

1. Wage Floor Mechanism: A national minimum wage of $14 is above the market-clearing equilibrium wage of $10. This creates a binding price floor. At this higher wage, the quantity of labor supplied by workers increases from \(Q_E\) to \(Q_S\) (as more workers are attracted by the higher wage), while the quantity of labor demanded by retail firms contracts from \(Q_E\) to \(Q_D\). 2. Role of Labor Demand Elasticity: Because the demand for retail labor is price-elastic (\(PED > 1\)), retail firms are highly sensitive to wage increases. They may easily substitute labor with technology (e.g., automated checkouts) or reduce operational hours. As a result, the contraction in quantity demanded is proportionally larger than the wage increase, leading to a substantial excess supply of labor (unemployment equal to \(Q_S - Q_D\)).

評分準則

Knowledge: Up to 2 marks for identifying that a minimum wage above the equilibrium acts as a price floor and explaining how it creates an excess supply of labor (unemployment). Application: Up to 2 marks for applying relevant details from Figure 3 (the $10 equilibrium wage, the $14 minimum wage, and the elastic labor demand condition). Analysis: Up to 2.8 marks for explaining how the high elasticity of labor demand magnifies the contraction in employment, resulting in significant job losses in the retail sector.
題目 9 · Data Response
6 分
Extract A: In 2022, the government of Zephyrus introduced a 30% subsidy on the purchase of electric cargo bikes (e-bikes) for local delivery businesses. Previously, 85% of last-mile deliveries were conducted using diesel vans, contributing heavily to urban air pollution (nitrogen dioxide) and severe traffic congestion. The Ministry of Transport reported that within one year, e-bike deliveries increased by 140%, resulting in a measurable improvement in air quality and a 12% reduction in average delivery times across major cities due to less congestion. With reference to Extract A, analyze the external benefits that might arise from the consumption of electric cargo bikes.
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解題

External benefits (positive externalities) are beneficial spillover effects enjoyed by third parties who are not directly involved in the production or consumption of a good. In Zephyrus, the consumption of electric cargo bikes by delivery firms creates significant external benefits. First, the reduction in diesel van usage cuts nitrogen dioxide emissions, leading to cleaner urban air. This benefits third-party city residents who experience fewer respiratory illnesses, thereby lowering treatment costs for the public health service. Second, the 12% reduction in delivery times reflects a decrease in traffic congestion. This directly benefits other road users, such as commuters and public transport operators, who enjoy faster, more predictable journeys and lower fuel wastage, enhancing overall economic productivity.

評分準則

Knowledge/Understanding: 2 marks for defining or explaining external benefits / positive externalities of consumption (e.g., marginal social benefit exceeding marginal private benefit, or benefits to third parties outside the market transaction). Application: 2 marks for identifying relevant points from Extract A (e.g., 140% increase in e-bike deliveries, 12% reduction in delivery times, shift away from diesel vans). Analysis: 2 marks for explaining how these lead to third-party benefits (e.g., linking cleaner air to reduced government healthcare spending on respiratory diseases, or linking reduced road congestion to shorter commutes and increased productivity for other motorists).
題目 10 · Data Response
6 分
Extract B: The economy of Ostaria experienced a sharp rise in inflation, from 1.8% in 2021 to 7.4% in 2023. This spike was driven by two main factors. First, global supply chain disruptions led to a 45% increase in the price of imported raw materials and energy. Second, to support households during the recent recession, the Ostarian central bank reduced interest rates to a record low of 0.25% and engaged in quantitative easing, which triggered a significant expansion in consumer credit and household consumption. With reference to Extract B, analyze two causes of the increase in inflation in Ostaria between 2021 and 2023.
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解題

The increase in Ostaria's inflation is caused by a combination of cost-push and demand-pull factors. First, cost-push inflation is triggered by supply-side shocks, specifically the 45% rise in the price of imported raw materials and energy. This increases the costs of production for domestic firms, shifting the Short-Run Aggregate Supply (SRAS) curve to the left and forcing businesses to pass these costs onto consumers through higher prices. Second, demand-pull inflation is caused by expansionary monetary policy. By cutting interest rates to 0.25% and using quantitative easing, the central bank reduced the incentive to save and lowered the cost of borrowing. This triggered an expansion in credit and consumer spending, shifting the Aggregate Demand (AD) curve to the right and putting upward pressure on the price level.

評分準則

Knowledge/Understanding: 2 marks for identifying and explaining cost-push inflation and demand-pull inflation. Application: 2 marks for applying to the data from Extract B (e.g., referencing the 45% rise in raw material/energy prices and the 0.25% interest rate or credit expansion). Analysis: 2 marks for explaining the transmission mechanisms (e.g., explaining that higher import costs shift SRAS left and raise prices, and explaining that lower interest rates increase consumer expenditure, shifting AD right and pulling up prices).

Unit 1 & 2 部分 D (Long Essays)

Answer one of the two long essay questions per unit. Each essay is worth 20 marks.
2 題目 · 40 分
題目 1 · essay
20 分
Evaluate the microeconomic impacts of a government policy aimed at increasing contestability within a highly concentrated oligopolistic industry. Use appropriate diagrams to support your analysis.
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解題

Introduction

Contestability refers to the ease with which new firms can enter and exit an industry without facing significant sunk costs. In a highly concentrated oligopolistic market, barriers to entry are high, allowing incumbent firms to earn supernormal profits and operate inefficiently. A government policy aimed at increasing contestability (e.g., through deregulation, lowering legal barriers, or removing sunk costs) aims to force incumbent firms to behave more competitively.

Analysis: Positive Microeconomic Impacts

  • Pricing and Output: In a contestable market, even if the market remains concentrated, the threat of 'hit-and-run' entry forces incumbent oligopolists to lower prices and increase output. To prevent entry, incumbents may change their pricing strategy from profit maximisation (\(MC = MR\)) to limit pricing (where prices are set just below the average cost of potential entrants, or closer to normal profit levels where \(AR = AC\)).
  • Allocative and Productive Efficiency: Lower prices bring the market closer to allocative efficiency (\(P = MC\)). Furthermore, the pressure of potential competition forces incumbents to eliminate organisational slack ('X-inefficiency') and produce at a lower average cost curve, promoting productive efficiency.
  • Diagrammatic Representation: A diagram showing a firm operating at profit-maximising equilibrium (\(P_1, Q_1\)) where \(MC=MR\), earning supernormal profits, shifting to a limit-pricing equilibrium (\(P_2, Q_2\)) where \(AR=AC\) (normal profit), resulting in lower prices and higher output.

Evaluation: Counterarguments and Limitations

  • Loss of Dynamic Efficiency: In a highly contestable market, long-run supernormal profits are eroded because they are competed away or avoided to deter entry. Without supernormal profits, firms may lack the necessary funds to reinvest in research and development (R&D). This can lead to a long-term loss of dynamic efficiency, which is highly detrimental in technology-intensive sectors like telecommunications.
  • Loss of Economies of Scale: If increased contestability leads to actual market fragmentation (more small firms entering), the industry may lose significant economies of scale. In industries with high fixed costs (natural monopoly tendencies like energy grids), having multiple smaller entrants can raise the average cost of production, leading to higher prices for consumers.
  • Incumbent Response (Strategic Barriers): Incumbents may respond to government policies by creating non-price barriers to entry, such as aggressive advertising campaigns, loyalty schemes, or brand proliferation, which effectively reduces the contestability of the market despite policy efforts.
  • Asymmetric Information and Sunk Costs: Some sunk costs are unavoidable (e.g., marketing to establish a brand). Therefore, true contestability is rarely achieved, and the threat of entry may remain weak.

Conclusion

The microeconomic impact of policies increasing contestability depends heavily on the nature of the industry. In industries where technological progress is rapid, contestability must be balanced with the need for dynamic efficiency. However, in mature industries with little innovation, increasing contestability is highly beneficial as it successfully drives down prices and eliminates X-inefficiency without harming future product quality.

評分準則

Mark Scheme (Total: 20 marks)

Knowledge, Application, and Analysis (KAA) - 12 Marks:
  • Level 3 (9-12 marks): Demonstrates precise economic terms and theories. Uses highly relevant diagrams illustrating profit maximisation vs limit pricing/normal profit under contestability. Clear, logical chains of reasoning showing how contestability drives efficiency and lower prices.
  • Level 2 (5-8 marks): Accurate knowledge of contestability, but with simplified analysis. Diagrams are present but may contain minor labelling errors or lack complete integration with the text.
  • Level 1 (1-4 marks): Identification of basic concepts (e.g., definition of contestability or oligopoly) without coherent analytical development.

Evaluation - 8 Marks:
  • Level 3 (7-8 marks): Provides a highly structured, balanced evaluation. Offers deep insights into dynamic efficiency trade-offs, economies of scale, or strategic responses by incumbents. Concludes with a nuanced judgment on the dependency of outcomes on industry characteristics.
  • Level 2 (4-6 marks): Explains evaluative points (e.g., loss of R&D funding) but lacks depth or a strong concluding judgment.
  • Level 1 (1-3 marks): Identifies evaluative points without analytical detail or structure.
題目 2 · essay
20 分
Evaluate the extent to which the expansion of multinational corporations (MNCs) promotes sustainable economic growth and development in developing economies.
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解題

Introduction

Multinational Corporations (MNCs) are businesses that operate in more than one country. Their expansion is a key driver of economic globalisation. While MNCs bring foreign direct investment (FDI) and create jobs in developing nations, their presence is highly controversial. This essay evaluates whether the expansion of MNCs promotes sustainable economic growth and development, which involves not just rising real GDP but improvements in living standards, healthcare, education, and environmental quality.

Analysis: Positive Impacts on Growth and Development

  • FDI and the Harrod-Domar Model: Developing countries often suffer from a 'savings gap' that limits investment. MNCs inject capital via FDI, filling this gap and shifting the Aggregate Demand (AD) and Long-Run Aggregate Supply (LRAS) curves outward, leading to sustained economic growth.
  • Employment and Human Capital: MNCs create direct employment opportunities and often invest in training local workers. This transfers management skills and technological know-how (the 'demonstration effect'), boosting labor productivity and long-term human capital development.
  • Infrastructure and Tax Revenues: To facilitate their operations, MNCs often build or co-fund infrastructure (roads, ports, telecommunication networks). Additionally, corporate tax paid by MNCs can expand the host government's fiscal space, enabling increased public spending on merit goods like education and healthcare.
  • Trade Balance: MNCs often establish export-oriented manufacturing plants, which improves the host country's current account balance on the balance of payments.

Evaluation: Negative Impacts and Limitations

  • Profit Repatriation and Capital Flight: MNCs may send their profits back to their home countries (repatriation of profits) rather than reinvesting them in the local economy. This worsens the primary income account of the host nation's balance of payments and limits the domestic multiplier effect.
  • Tax Avoidance and Transfer Pricing: Many MNCs engage in transfer pricing—manipulating internal transaction prices between subsidiaries to report low profits in high-tax developing countries and high profits in tax havens. Consequently, host governments may gain very little tax revenue.
  • Environmental Degradation and Exploitation: MNCs may exploit weaker regulatory frameworks in developing countries, leading to environmental degradation (e.g., deforestation, pollution) that undermines sustainable development. Furthermore, low wages and poor working conditions can lead to exploitation rather than genuine human development.
  • Dual Economies and Crowding Out: MNCs can create a 'dual economy' where a highly productive, foreign-dominated modern sector exists alongside a stagnant, traditional domestic sector. Local firms may be unable to compete and get 'crowded out' of the market.

Conclusion

In conclusion, the extent to which MNCs promote sustainable development depends crucially on the host country's regulatory environment and governance. If the host government has strong institutions, enforces strict environmental and labor laws, and implements policies to encourage local supply-chain integration, MNCs can be a powerful engine for development. Conversely, in countries with weak governance, MNCs may engage in extractive behaviors that generate short-term GDP growth at the expense of long-term sustainable development.

評分準則

Mark Scheme (Total: 20 marks)

Knowledge, Application, and Analysis (KAA) - 12 Marks:
  • Level 3 (9-12 marks): Demonstrates excellent economic analysis of how MNCs impact development (using concepts like the savings gap, FDI, LRAS, multiplier, and technology transfer). Well-structured, logical chains of reasoning linking MNC activity to development indicators (HDI, infrastructure).
  • Level 2 (5-8 marks): Good understanding of MNCs and development but lacks depth or uses a narrower analytical range. Explains points without fully integrating development concepts.
  • Level 1 (1-4 marks): Basic description of MNCs or globalisation with no analytical structure or link to development.

Evaluation - 8 Marks:
  • Level 3 (7-8 marks): Provides a balanced, sophisticated evaluation. Clearly contrasts growth (GDP) vs sustainable development (HDI, environment). Evaluates systemic issues like transfer pricing, profit repatriation, and institutional quality. Concludes with a strong, reasoned judgment.
  • Level 2 (4-6 marks): Explains evaluative points (e.g., pollution or exploitation) but lacks a deep analytical approach or strong synthesis.
  • Level 1 (1-3 marks): Basic list of negatives without evaluation or balanced comparison.

Unit 3 & 4 乙部 (Case Study)

Answer all case study questions in Section B based on the source booklets. Marks range from 2 to 14.
10 題目 · 70.39999999999999 分
題目 1 · Case Study Analysis & Evaluation
6.8 分
With reference to Extract A, explain two reasons why rapid globalisation may lead to structural unemployment in a developed economy like the UK.
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解題

Globalisation involves increased international integration and trade. First, lower wage costs in developing countries encourage multinational corporations to offshore manufacturing activities. This leads to the closure of domestic factories and structural unemployment among workers whose skills are highly specific to manufacturing. Second, globalisation accelerates technological adoption and shifts a country's comparative advantage towards high-skilled service sectors, leaving low-skilled workers in declining industries structurally unemployed because of occupational immobility.

評分準則

Up to 3 marks for identifying and explaining the first reason (1 mark for identification, 1 mark for application/reference to Extract A, 1 mark for analysis of structural unemployment).
Up to 3 marks for identifying and explaining the second reason (1 mark for identification, 1 mark for application, 1 mark for analysis).
0.8 marks for clear coherent economic chain of reasoning.
題目 2 · Case Study Analysis & Evaluation
6.8 分
With reference to Extract B, examine the likely microeconomic and macroeconomic effects of a significant depreciation of the country's currency.
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解題

A depreciation of the currency makes exports cheaper in foreign currency and imports more expensive in local currency. Microeconomic effects: Domestic exporting firms experience a surge in demand and revenues, while domestic firms relying on imported raw materials face higher costs of production, potentially squeezing profit margins. Macroeconomic effects: Assuming the Marshall-Lerner condition holds, the current account of the balance of payments will improve over time. However, the higher cost of imported finished goods and raw materials causes cost-push inflation, shifting the short-run aggregate supply curve to the left.

評分準則

Knowledge, Application, and Analysis (up to 4 marks):
- 2 marks for explaining microeconomic effects (e.g., impact on firms' costs and revenue).
- 2 marks for explaining macroeconomic effects (e.g., current account and inflation).
Evaluation (up to 2.8 marks):
- Assessment of the Marshall-Lerner condition or J-curve effect (1.4 marks).
- Consideration of the size and duration of the depreciation, or the price elasticity of demand for imports and exports (1.4 marks).
題目 3 · Case Study Analysis & Evaluation
6.8 分
With reference to Extract C, discuss whether a government should intervene to regulate a monopoly provider of regional rail services.
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解題

A monopoly rail provider has significant market power, enabling it to set high ticket prices and output below the socially optimum level, leading to allocative inefficiency. Government intervention (such as price capping or quality standards) can protect consumers and increase consumer surplus. However, regulation can lead to government failure due to asymmetric information, where the regulator lacks accurate cost data, or regulatory capture, where the regulator becomes too sympathetic to the rail firm. Consequently, the costs of monitoring and enforcement might exceed the welfare gains.

評分準則

Knowledge, Application, and Analysis (up to 4 marks):
- 2 marks for identifying and analyzing monopoly market power and allocative/productive inefficiency.
- 2 marks for explaining regulatory methods (e.g., price caps like RPI-X).
Evaluation (up to 2.8 marks):
- 1.4 marks for discussing government failure (e.g., asymmetric information).
- 1.4 marks for discussing regulatory capture or unintended consequences of regulation.
題目 4 · Case Study Analysis & Evaluation
6.8 分
With reference to Extract D, analyze the economic effects of an increase in the national minimum wage on the domestic labour market.
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解題

An increase in the minimum wage shifts the wage rate above the competitive equilibrium. In a perfectly competitive labour market, this creates an excess supply of labour (unemployment) as firms reduce the quantity of labour demanded due to higher marginal costs, while more workers enter the market. However, if the market is monopsonistic, a minimum wage can actually increase both wages and employment by making the marginal cost of labour constant. Additionally, higher wages can increase worker productivity through efficiency wage theory, offsetting some of the increased costs for firms.

評分準則

Knowledge, Application, and Analysis (up to 4.8 marks):
- 2 marks for explaining the standard competitive labour market analysis (unemployment effect).
- 2.8 marks for applying the analysis to monopsonistic markets or efficiency wage theory, supported by relevant data or diagrams.
Evaluation / Counter-arguments (up to 2 marks):
- Assessment of the elasticity of demand for labour (0.5 marks).
- Discussion of potential wage-price spirals (0.5 marks).
- Discussion of impact on small versus large businesses (1 mark).
題目 5 · Case Study Analysis & Evaluation
6.8 分
With reference to Extract E, assess the extent to which demand-side policies are effective in promoting long-run economic growth.
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解題

Demand-side policies, such as expansionary monetary policy (cutting interest rates) or fiscal policy (increasing government spending), increase aggregate demand (AD). This can stimulate short-run actual economic growth by bringing idle resources into use, particularly during a recession. However, long-run economic growth is determined by an increase in the productive capacity of the economy (shifting the LRAS curve to the right). Without supply-side improvements (such as investments in education, technology, and infrastructure), sustained increases in AD will eventually lead to demand-pull inflation rather than long-run growth.

評分準則

Knowledge, Application, and Analysis (up to 4 marks):
- 2 marks for explaining how demand-side policies shift AD to achieve short-run actual growth.
- 2 marks for explaining how supply-side changes are needed to shift LRAS for long-run potential growth.
Evaluation (up to 2.8 marks):
- 1.4 marks for evaluating the limitations of fiscal/monetary policies (e.g., time lags, crowding out, national debt).
- 1.4 marks for discussing how investment-led demand policies (like infrastructure spending) can simultaneously shift both AD and LRAS.
題目 6 · Case Study Analysis & Evaluation
6.8 分
With reference to Extract F, explain the conflicts that may arise between the macroeconomic objectives of low inflation and high economic growth.
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解題

When a government or central bank uses expansionary policies to stimulate rapid economic growth, aggregate demand (AD) increases. If AD grows faster than aggregate supply (AS), the economy approaches its productive capacity, leading to bottlenecks and shortages of resources. This results in demand-pull inflation as firms raise prices to ration the scarce output. Consequently, the objective of maintaining low and stable inflation conflicts with the objective of achieving rapid economic growth, as shown by a movement up the short-run Phillips curve.

評分準則

Knowledge, Application, and Analysis (up to 4.8 marks):
- 2 marks for explaining the mechanism through which AD growth causes demand-pull inflation.
- 2.8 marks for illustrating the conflict using an AD/AS diagram (shifts in AD leading to higher price levels) or the Phillips Curve framework.
Evaluation / Counter-arguments (up to 2 marks):
- Assessment of the state of the economy: conflict is less severe if there is a large negative output gap (1 mark).
- Analysis of supply-side growth: if growth is driven by supply-side improvements, both objectives can be achieved simultaneously without conflict (1 mark).
題目 7 · Case Study Analysis & Evaluation
6.8 分
With reference to Extract G, evaluate the use of supply-side policies, rather than monetary policy, to reduce a persistent current account deficit.
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解題

A persistent current account deficit often stems from structural issues, such as low productivity and poor international competitiveness. Supply-side policies (such as labor market deregulation, investment in education, or infrastructure spending) lower production costs and increase quality, making domestic exports more attractive and reducing import dependence. However, these policies take many years to yield results. In contrast, monetary policy (such as raising interest rates or depreciating the currency) can quickly reduce domestic consumption of imports or boost export price competitiveness, but it may cause high inflation or harm domestic economic growth.

評分準則

Knowledge, Application, and Analysis (up to 4 marks):
- 2 marks for explaining how supply-side policies improve long-term export competitiveness.
- 2 marks for comparing this with monetary policy tools (e.g., interest rate increases reducing import spending).
Evaluation (up to 2.8 marks):
- 1.4 marks for analyzing the time lags and high opportunity/financial costs of supply-side policies.
- 1.4 marks for assessing the root cause of the deficit (structural vs cyclical) and concluding which policy is more appropriate.
題目 8 · Case Study Analysis & Evaluation
6.8 分
With reference to Extract H, analyze how the introduction of automated technology affects the short-run and long-run cost curves of a manufacturing firm.
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解題

Introducing automated technology requires high initial capital investment, which increases the firm's total fixed costs. Consequently, the short-run average fixed cost (AFC) rises. However, automation significantly reduces the variable costs of production, such as labor expenses per unit. This shifts the short-run marginal cost (MC) and average variable cost (AVC) curves downwards, resulting in a net decrease in short-run average total cost (SRAC) at high levels of output. In the long run, all costs are variable, and automation allows the firm to achieve technical economies of scale, shifting the entire long-run average cost (LRAC) curve downwards and widening the range of constant or increasing returns to scale.

評分準則

Knowledge, Application, and Analysis (up to 4.8 marks):
- 2 marks for explaining the shift in short-run cost curves (increase in fixed costs vs decrease in variable/marginal costs).
- 2.8 marks for explaining the impact on the long-run cost curves and the realization of technical economies of scale.
Evaluation / Counter-arguments (up to 2 marks):
- Discussion of the minimum efficient scale (MES) and whether the market is large enough to support the necessary level of output (1 mark).
- Discussion of the risks of diseconomies of scale, such as coordination and communication problems with highly automated, rigid systems (1 mark).
題目 9 · Case Study Analysis & Evaluation
8 分
With reference to the information provided, analyse the likely effects of deregulation on the economic efficiency of the domestic aviation market in Veridia.
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解題

### Definition and Mechanism
Deregulation involves the removal of government-imposed barriers to entry and exit (such as licensing requirements and cabotage restrictions) to make a market more contestable.

### Allocative Efficiency
- Prior to deregulation, the state-owned monopolist VeriAir held a 75% market share, likely charging prices well above marginal cost (\(P > MC\)), resulting in allocative inefficiency.
- The entry of three new low-cost carriers increased competition, leading to a 30% reduction in average ticket prices and a rise in passenger volume from 12 million to 18 million. This expansion of output moves price closer to marginal cost (\(P \approx MC\)), increasing consumer surplus and improving allocative efficiency.

### Productive Efficiency
- Faced with threat and actual entry of rivals, the incumbent VeriAir must reduce its organizational slack (X-inefficiency) to survive. This drives the firm to produce closer to the minimum point of its average cost (AC) curve, enhancing productive efficiency.

### Potential Negative Effects / Inefficiencies
- Market forces prioritize profitable routes. The abandonment of low-traffic rural routes represents a market failure (loss of allocative efficiency for rural residents who no longer have access to vital transport infrastructure), indicating that deregulation may have uneven regional efficiency outcomes.

評分準則

### Mark Breakdown
- **Knowledge and Understanding (2 Marks):** Clear definition of deregulation and its theoretical link to economic efficiency (allocative, productive, or dynamic efficiency).
- **Application (2 Marks):** Explicit references to the case study (e.g., VeriAir's 75% market share, 30% price reduction, passenger numbers growing from 12m to 18m, or rural route abandonment).
- **Analysis (4 Marks):** Structured economic analysis of how entry barriers reduction increases contestability, forces price down towards marginal cost (allocative efficiency), and pressures firms to minimise unit costs (productive efficiency), contrasted with potential market failures (abandoned routes).

### Guidance
- *Accept* diagrams showing a shift from monopoly pricing to a more competitive outcome to support the analysis of efficiency.
- *Reject* purely generic definitions of efficiency that do not link back to the aviation market or deregulation.
題目 10 · Case Study Analysis & Evaluation
8 分
With reference to the information provided, analyse the likely effects of the 15% depreciation of the Zen (Z$) on Zendia's current account balance.
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解題

### Price Effects of Depreciation
A 15% depreciation of the Zen (Z$) means that Zendian exports become cheaper in foreign currencies, while imports into Zendia become more expensive in domestic terms.

### The Marshall-Lerner Condition
- The current account balance will improve if the sum of the price elasticities of demand for exports and imports is greater than 1: \(PED_x + PED_m > 1\).
- Zendia's export base is mixed:
- **High-tech electronic components** are price-elastic. A lower exchange rate will trigger a more than proportionate increase in the quantity demanded of these goods, significantly raising export revenues.
- **Agricultural commodities** are price-inelastic. A fall in price in foreign currency terms will lead to a less than proportionate increase in export volumes, potentially reducing export revenue in foreign currency for this sub-sector.

### Short-run vs. Long-run (J-Curve Effect)
- In the immediate short run, the current account deficit (which was 5% of GDP in 2023) may deteriorate because import contracts are fixed in price and consumer habits take time to adjust. Over time, as elasticities of demand increase, the Marshall-Lerner condition is satisfied and the trade balance should improve.

評分準則

### Mark Breakdown
- **Knowledge and Understanding (2 Marks):** Clear explanation of exchange rate depreciation and the Marshall-Lerner condition or the J-curve effect.
- **Application (2 Marks):** Use of specific data points from the text (15% depreciation, 5% GDP current account deficit, price-elastic electronics, price-inelastic agricultural commodities).
- **Analysis (4 Marks):** Logical chain of reasoning showing how relative price changes affect export and import values, differentiating the impact between price-elastic (electronics) and price-inelastic (agricultural) sectors, and explaining why the deficit may change over time.

### Guidance
- *Accept* a well-labelled J-curve diagram to support the short-run vs. long-run analysis.
- *Reject* analysis that assumes all exports react identically without distinguishing between the elastic electronics and inelastic agricultural sectors.

Unit 3 & 4 部分 C (Long Essays)

Answer two of the three long essay questions per unit. Each essay is worth 20 marks.
4 題目 · 80 分
題目 1 · Evaluative Essay
20 分
Evaluate the view that technological change has made markets more contestable, leading to increased economic efficiency and benefits for consumers.
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解題

### Introduction
- **Contestable Market:** A market structure where there is freedom of entry and exit, and sunk costs are low or zero. In a perfectly contestable market, the threat of 'hit-and-run' entry forces existing firms to behave as if they are in a competitive market (pricing at limit-pricing or normal profit levels).
- **Technological Change:** Refers to innovations in products, processes, and business models (e.g., e-commerce, cloud computing, artificial intelligence, and digital platforms).
- **Outline of Argument:** While technology has dramatically lowered traditional barriers to entry (such as physical shopfronts and capital-intensive distribution networks), it has simultaneously created new, formidable barriers, particularly through network effects and control over massive data assets.

### Arguments that Technological Change has Increased Contestability and Efficiency (Analysis/Application)
1. **Lowering Sunk and Fixed Costs:**
- **E-commerce & Cloud Computing:** Startups no longer need expensive physical storefronts or massive mainframe IT systems. They can rent cloud infrastructure (e.g., AWS, Azure) and use online marketplaces (e.g., Shopify, Amazon) to reach global audiences instantly.
- This reduces the capital requirements for entry and lowers sunk costs (exit is easier because assets do not need to be liquidated at a huge loss), making 'hit-and-run' entry highly feasible.
2. **Improved Information Flow:**
- **Price Comparison Websites and Search Engines:** Consumers can easily compare prices, quality, and reviews. This reduces asymmetric information, making it easier for new, higher-quality, or cheaper entrants to gain market share quickly.
3. **Productive, Allocative, and Dynamic Efficiency:**
- Because of the heightened threat of entry, incumbent firms cannot afford to be inefficient. They must keep prices close to average cost (\(P = AC\), limit pricing) to deter entrants, which increases allocative efficiency (\(P\) closer to \(MC\)).
- Firms must also operate at the lowest point of their AC curves (productive efficiency) to protect their profit margins and continuously innovate (dynamic efficiency) to avoid obsolescence.

### Counterarguments / Limitations: New Barriers to Entry Created by Technology (Evaluation)
1. **Network Economies of Scale:**
- Many digital markets are characterized by **network externalities** (the value of a service increases as more people use it, e.g., social media platforms like Meta, or operating systems). This creates natural, massive barriers to entry.
- The market often tips toward a single dominant player, resulting in a **'winner-take-all'** outcome, making the market highly uncontestable despite low initial setup costs.
2. **Asymmetric Data and Algorithms:**
- Large incumbents (e.g., Google, Amazon) collect vast amounts of consumer data. They use advanced machine learning algorithms to target consumers, optimize pricing, and anticipate trends.
- A new entrant, lacking access to this historical data, faces an insurmountable barrier to entry, as they cannot offer the same level of personalization or efficiency.
3. **Acquisition of Competitors ('Killer Acquisitions'):**
- Tech giants frequently buy out potential competitors before they become a threat (e.g., Facebook acquiring Instagram and WhatsApp). This actively prevents markets from remaining contestable.
4. **Brand Loyalty and Marketing Costs:**
- Although setting up an online business is cheap, getting noticed in a crowded digital space requires massive advertising spend on search engines and social media, which acts as a significant sunk cost.

### Conclusion
- Technological change is a double-edged sword for contestability. It has democratized entry in the retail, publishing, and services sectors, reducing traditional physical barriers.
- However, in high-tech and platform-based markets, technology has facilitated the rise of digital monopolies protected by deep-moat barriers like network effects and data superiority. Thus, the degree of contestability and consumer benefit depends heavily on regulatory oversight and the specific nature of the sub-industry.

評分準則

**Marking Scheme: Evaluative Essay (20 Marks Total)**

**Knowledge, Application, and Analysis (12 Marks):**
- **10–12 marks:** Excellent understanding of the characteristics of contestable markets, barrier to entry, and the nature of technological change. Clear, logical chain of reasoning showing how technological change reduces barriers to entry (e.g., lower sunk costs, better information) and impacts economic efficiency (allocative, productive, dynamic). Well-integrated economics terminology and relevant real-world or theoretical examples.
- **7–9 marks:** Good understanding of contestability and efficiency. Analysis is mostly clear but may lack depth in explaining how specific technological factors (e.g., cloud computing, e-commerce) reduce sunk costs or drive efficiency. Some use of economic terms.
- **4–6 marks:** Basic knowledge of contestability or efficiency. Conceptual errors may be present, or the connection to technological change is weak.
- **1–3 marks:** Superficial or descriptive answers with little or no economic analysis.

**Evaluation (8 Marks):**
- **7–8 marks:** Deep, balanced evaluation that critically examines the counterarguments. Clearly analyzes how technology creates new barriers (network effects, data advantages, platform dominance, killer acquisitions). Offers a reasoned concluding judgment on the overall net impact on contestability and consumer welfare.
- **5–6 marks:** Good evaluative points. Identifies some limitations of the technology-as-a-contester argument (e.g., mentions network effects or tech monopolies), but the discussion may lack depth or fails to provide a strong, reasoned conclusion.
- **3–4 marks:** Identifies some basic evaluative points (e.g., 'large tech companies have power') but without structured economic reasoning or balance.
- **1–2 marks:** Very limited or generic evaluative comments without support.
題目 2 · Evaluative Essay
20 分
Evaluate the effectiveness of expenditure-reducing policies, compared to expenditure-switching policies, in reducing a persistent current account deficit.
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解題

### Introduction
- **Current Account Deficit:** Occurs when the value of goods, services, and primary/secondary income outflows exceeds inflows. A persistent deficit suggests structural uncompetitiveness or excess domestic spending on imports.
- **Expenditure-reducing policies:** Policies designed to reduce the overall level of domestic spending (Aggregate Demand) to curb import consumption. Examples: contractionary monetary policy (higher interest rates) or contractionary fiscal policy (increased taxation, reduced public spending).
- **Expenditure-switching policies:** Policies designed to persuade consumers to switch their spending away from imports and toward domestically produced goods. Examples: devaluation/depreciation of the exchange rate, or protectionist measures (tariffs, quotas).

### Analysis of Expenditure-Reducing Policies (12 marks - partial)
- **Mechanism:** By increasing income tax or raising interest rates, household disposable income falls. Since imports are often income-elastic (normal goods), a fall in real incomes leads to a disproportionate drop in import expenditure.
- **Inflationary Impact:** Lower AD reduces demand-pull inflation. This makes domestic exports relatively cheaper and more internationally competitive over time.
- **AD/AS Link:** A reduction in AD shift leftward, closing any output gap and reducing import demand (\(M\) falls), directly improving the trade balance (\(X-M\)).

### Analysis of Expenditure-Switching Policies (12 marks - partial)
- **Mechanism of Devaluation/Depreciation:** A weaker currency makes exports cheaper in foreign currency and imports more expensive in local currency.
- **The Marshall-Lerner Condition:** For a depreciation to improve the current account, the sum of the price elasticities of demand for exports and imports must be greater than one: \(|PED_x| + |PED_m| > 1\).
- **Tariffs and Quotas:** Artificially raise the price of imports, encouraging consumers to switch to domestic alternatives.

### Evaluation of Expenditure-Reducing vs. Expenditure-Switching (8 marks)
1. **Trade-offs of Expenditure-Reducing Policies:**
- **Conflicts with other macroeconomic objectives:** Reducing AD leads to lower economic growth and higher cyclical unemployment (Okun's Law). It is politically unpopular and economically damaging if the economy is already in a recession.
- **Inefficient if the deficit is structural:** If the country lacks domestic manufacturing capacity, consumers will still buy essential imports, and the deficit will only shrink at the cost of severe domestic hardship.
2. **Trade-offs of Expenditure-Switching Policies:**
- **The J-Curve Effect:** In the short run, a currency depreciation may worsen the current account deficit because contracts are fixed and demand is inelastic (\(|PED_x| + |PED_m| < 1\)). Only in the medium-to-long term does it improve as consumers adjust.
- **Inflationary risks:** A weaker currency makes imported raw materials and components more expensive, causing cost-push inflation, which can erode the competitive advantage gained.
- **Protectionist Retaliation:** Using tariffs or quotas violates WTO rules and can lead to retaliatory tariffs from trade partners, harming the export sector and failing to improve the current account.
3. **The Role of Supply-Side Policies:**
- Neither policy solves the underlying structural weakness (low productivity, poor quality, lack of innovation). Supply-side policies (investment in education, infrastructure, R&D) are essential for long-term improvement in competitiveness.

### Conclusion
- Expenditure-reducing policies are highly effective at cooling an overheating economy and rapidly lowering imports, but they cause painful recessions. Expenditure-switching policies target the relative prices directly but are subject to lag times (J-Curve), inflationary pressures, and foreign retaliation.
- Therefore, the most effective strategy is a coordinated policy mix: expenditure-reducing to curb excess demand, expenditure-switching to adjust relative prices, and supply-side reforms to boost structural competitiveness.

評分準則

**Marking Scheme: Evaluative Essay (20 Marks Total)**

**Knowledge, Application, and Analysis (12 Marks):**
- **10–12 marks:** Precise definitions of current account deficit, expenditure-reducing, and expenditure-switching policies. Detailed and accurate analysis of how both policies operate, including channels like income elasticities, exchange rate mechanisms, and aggregate demand. Clear use of relevant theoretical concepts (e.g., Marshall-Lerner condition, AD/AS framework).
- **7–9 marks:** Good explanation of both sets of policies. The mechanisms are mostly accurate, but the link between policy implementation and the current account balance may have minor analytical gaps or lacks robust theoretical scaffolding.
- **4–6 marks:** Basic identification of policies. Conceptual understanding is weak, or the student focuses almost entirely on one type of policy while neglecting the other.
- **1–3 marks:** Highly superficial with persistent errors in economic reasoning.

**Evaluation (8 Marks):**
- **7–8 marks:** Balanced and critical comparison of the two approaches. Evaluates the J-curve effect, conflicts with other macroeconomic objectives (unemployment, growth), inflation risks of depreciation, and the threat of protectionist retaliation. Offers a clear concluding judgment on the need for a policy mix and/or supply-side reforms.
- **5–6 marks:** Good evaluation that notes the downsides of both policies (e.g., unemployment for reducing, J-curve/elasticities for switching). The synthesis or final judgment may be slightly weak or underdeveloped.
- **3–4 marks:** Basic evaluative points (e.g., 'tariffs lead to retaliation' or 'higher taxes reduce growth') without linking them systematically to the effectiveness of reducing the deficit.
- **1–2 marks:** Minimal or unsupported evaluative statements.
題目 3 · Evaluative Essay
20 分
Evaluate the microeconomic and macroeconomic consequences of a significant increase in the national minimum wage in an economy with highly imperfect labour markets.
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解題

### Introduction
- **National Minimum Wage (NMW):** A legally mandated price floor for labour below which employers cannot pay.
- **Imperfect Labour Market (Monopsony):** A market where there is a single or dominant buyer of labour. In this structure, the employer has market power and faces an upward-sloping supply curve of labour, meaning the marginal cost of employing an additional worker (\(MC_L\)) is greater than the average cost/wage (\(AC_L\)).
- **Thesis:** In a monopsony, a moderate-to-significant NMW can improve both wages and employment. However, if the increase is too large or exceeds the marginal revenue product of labour, it can trigger classic competitive labor market distortions and adverse macroeconomic effects.

### Microeconomic and Macroeconomic Analysis (12 marks)
1. **Monopsony Labour Market Diagram Analysis:**
- Under free-market monopsony, the firm maximizes profit where \(MC_L = MRP_L\), paying a wage \(W_m\) which is below the competitive wage, and employing \(L_m\) workers. This creates allocative inefficiency and exploitation.
- Introducing an NMW at \(W_{min}\) (above \(W_m\)) makes the marginal cost of labour constant (horizontal) at \(W_{min}\) up to the supply curve.
- The firm now becomes a price taker for labour up to that point. It will employ more workers (up to \(L_{min}\)), where the new horizontal \(MC_L\) intersects \(MRP_L\).
- **Conclusion:** Within a certain range, an NMW increases both employment and wages, correcting the market failure of monopsony power.
2. **Microeconomic Benefits:**
- **Poverty Reduction & Equity:** Raises the incomes of low-paid workers, reducing income inequality (Gini coefficient).
- **Efficiency Wage Theory:** Higher wages can improve worker morale, reduce staff turnover, lower recruitment costs, and boost labour productivity.
3. **Macroeconomic Benefits:**
- **Aggregate Demand (AD) Boost:** Low-income workers have a high Marginal Propensity to Consume (MPC). Raising their wages shifts national income to those who spend most of it, shifting AD rightward (\(AD = C+I+G+(X-M)\)), boosting economic growth.
- **Reduction in Government Welfare Spend:** Reduces dependency on in-work benefits, improving the government's fiscal position.

### Evaluation of a 'Significant' Increase (8 marks)
1. **The Magnitude and the Competitive Threshold:**
- If the NMW is increased *significantly* beyond the competitive equilibrium or the worker's \(MRP_L\), the market transitions into the classical competitive model's predictions. The demand for labour will contract to \(L_d\) and supply will expand to \(L_s\), resulting in real-wage unemployment (\(L_s - L_d\)).
2. **Cost-Push Inflation and the Wage-Price Spiral:**
- A significant hike raises firms' unit labour costs. To maintain profit margins, firms (especially in labor-intensive service sectors like hospitality or retail) will pass these costs onto consumers, causing demand-pull/cost-push inflation.
- This can trigger a wage-price spiral if workers subsequently demand higher wages to keep up with cost-of-living increases.
3. **Capital-Labour Substitution:**
- If labour becomes too expensive, firms have a strong incentive to invest in capital, automation, and technology (e.g., self-service checkouts, robotic assembly), permanently displacing low-skilled workers.
4. **International Competitiveness:**
- High domestic labour costs raise the prices of exports. For open economies, this can lead to a deterioration of the trade balance and loss of market share to countries with lower labour costs.

### Conclusion
- The effect of an NMW is highly dependent on the initial structure of the labour market and the size of the increase. In highly imperfect, monopsonistic markets, a well-calibrated minimum wage corrects market failure and boosts both employment and macroeconomic demand.
- However, a 'significant' and rapid increase risks crossing the threshold where it acts as a distortionary price floor, leading to unemployment, structural shifts toward automation, and inflation.

評分準則

**Marking Scheme: Evaluative Essay (20 Marks Total)**

**Knowledge, Application, and Analysis (12 Marks):**
- **10–12 marks:** Excellent understanding of monopsony and competitive labour markets. Accurate diagrammatic analysis showing how a minimum wage corrects monopsonistic exploitation and increases employment. Logical chain of reasoning linking wage increases to micro benefits (productivity, equity) and macro impacts (AD, consumer spending).
- **7–9 marks:** Good understanding of minimum wages and imperfect markets. Analysis is mostly sound, but the diagram or its explanation may contain minor inaccuracies, or the connection between micro and macro consequences is somewhat disconnected.
- **4–6 marks:** Basic knowledge of minimum wages. Focuses almost entirely on a standard competitive labour market diagram (showing unemployment only) without properly addressing the 'highly imperfect labour markets' premise in the prompt.
- **1–3 marks:** Highly descriptive with little to no analytical or diagrammatic support.

**Evaluation (8 Marks):**
- **7–8 marks:** Strong, nuanced evaluation focusing on the word 'significant'. Analyzes the threshold effect (crossing the monopsony corrective limit into classical unemployment), wage-price spirals, capital-substitution, and effects on international competitiveness. Offers a clear concluding judgment.
- **5–6 marks:** Good evaluation. Identifies key drawbacks of a high minimum wage (e.g., inflation, job losses, automation), but the analysis of why these occur or the synthesis of how the magnitude of the wage matters is slightly limited.
- **3–4 marks:** Identifies basic limitations (e.g., 'firms might fire people') but lacks rigorous economic backing or balanced arguments.
- **1–2 marks:** Very brief or superficial evaluative comments.
題目 4 · Evaluative Essay
20 分
Evaluate the economic effects of the rapid growth of transnational corporations (TNCs) on the economic development of emerging economies.
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解題

### Introduction
- **Transnational Corporations (TNCs):** Firms that operate in more than one country, with headquarters usually in developed nations and production/service facilities globally.
- **Economic Development:** A multidimensional concept involving improvements in standards of living, reduction in poverty, improvements in health and education (HDI), alongside GDP growth.
- **Thesis:** The entry and growth of TNCs provide vital capital, technology, and jobs to emerging economies, acting as a catalyst for development. However, without strong domestic institutions and regulatory frameworks, TNCs can exploit resources, repatriate wealth, and stifle local competition, hindering sustainable development.

### Positive Economic Effects on Development (Analysis/Application) (12 marks)
1. **FDI and Capital Accumulation:**
- Emerging economies often suffer from a **savings gap** (Harrod-Domar model), where low domestic savings limit investment. TNCs inject foreign direct investment (FDI), filling this gap and driving capital accumulation.
2. **Employment and Skill Transfer:**
- TNCs create direct employment in factories and offices, and indirect employment through local supply chains.
- They provide training and skill development to local workers, raising human capital and productivity. Over time, 'knowledge spillover' occurs as local workers leave TNCs to start their own businesses.
3. **Technology and Infrastructure:**
- TNCs bring advanced manufacturing techniques, software, and managerial expertise.
- To facilitate their operations, they often invest in physical infrastructure (roads, ports, telecommunications, energy grids), which benefits the wider economy (positive externalities).
4. **Balance of Payments & Tax Revenue:**
- TNCs often manufacture for export, boosting the host country's export revenues and improving the current account.
- They also pay corporate tax and generate income tax from their workforce, providing the government with revenue to invest in merit goods like education and healthcare.

### Negative Economic Effects and Limitations (Evaluation) (8 marks)
1. **Profit Repatriation:**
- Although TNCs generate high profits, a significant portion is repatriated back to the home country (recorded as an outflow on the primary income account of the balance of payments), leaving less wealth inside the host nation.
2. **Transfer Pricing and Tax Avoidance:**
- TNCs can manipulate internal transaction prices between subsidiaries in different countries to ensure profits are declared in low-tax jurisdictions (tax havens), depriving the emerging economy of vital tax revenues.
3. **Exploitation and Environmental Degradation:**
- TNCs may choose emerging economies specifically to exploit weak labor laws (low wages, poor working conditions) and lax environmental regulations, leading to negative externalities like pollution, deforestation, and health crises.
4. **Crowding Out of Domestic Firms:**
- With massive economies of scale and brand power, TNCs can easily price local, infant industries out of the market, preventing indigenous industrial development.
5. **Footloose Capital:**
- TNCs have no domestic loyalty; if wages rise or a cheaper alternative country emerges, they can shut down operations rapidly, causing sudden structural unemployment.

### Conclusion
- The net effect of TNCs on the development of emerging economies is not universally positive or negative; it depends on **governance**.
- In countries with strong regulatory frameworks, local content requirements (forcing TNCs to buy from local suppliers), and joint-venture mandates (e.g., China's approach), TNCs have been highly effective engines of development.
- Conversely, in weak institutional environments, TNCs may lead to primary product dependency, environmental damage, and resource exploitation without genuine long-term development.

評分準則

**Marking Scheme: Evaluative Essay (20 Marks Total)**

**Knowledge, Application, and Analysis (12 Marks):**
- **10–12 marks:** Precise understanding of TNCs and economic development. Strong analytical links showing how FDI, technology transfer, and employment lead to developmental improvements (e.g., reference to the Harrod-Domar savings gap, human capital, tax revenues). Consistent use of economic concepts and development theories.
- **7–9 marks:** Good understanding of the role of TNCs. Clear analysis of positive effects, but may lack a multi-dimensional view of 'development' (focusing primarily on basic GDP growth rather than HDI, poverty, or infrastructure).
- **4–6 marks:** Basic identification of the pros and cons of multinational companies. Lack of structured economic reasoning or development theory.
- **1–3 marks:** Highly descriptive with no clear economic structure.

**Evaluation (8 Marks):**
- **7–8 marks:** Deep, balanced evaluation analyzing transfer pricing, profit repatriation, environmental degradation, and the 'footloose' nature of TNCs. Offers a critical, nuanced conclusion that highlights the role of governance, local content laws, and regulatory institutions in determining the net outcome.
- **5–6 marks:** Good evaluation. Identifies multiple negative consequences of TNCs (e.g., tax avoidance, low wages, environmental issues), but the discussion of these issues is somewhat isolated, or the final judgment lacks depth.
- **3–4 marks:** Basic evaluative points (e.g., 'TNCs pollute the environment' or 'they pay low wages') without linking them systematically to the broader theme of economic development.
- **1–2 marks:** Very limited or generic evaluative comments.

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