2025 Cambridge IGCSE Economics (0455) 模拟试题及答案详解

Opportunity cost is defined as the next best alternative foregone when a decision is made. Because the student chose to study, the opportunity cost is the next best alternative they gave up, which would be either going to the cinema or earning $20, depending on which of the two was their second preference.

Award 1 mark for option C.

Producing inside the PPC indicates that the economy's resources are underemployed or inefficiently allocated. A decrease in the rate of unemployment means that more of the existing labor force is being utilized, which moves the level of production closer to or onto the PPC boundary. Options B, C, and D would increase productive capacity and shift the PPC itself outward.

Award 1 mark for option A.

Microeconomics focuses on individual parts of the economy, such as the labor market wages of a specific industry or region. Macroeconomics focuses on the economy as a whole, such as the national rate of inflation.

Award 1 mark for option C.

An increase in the price of petrol cars (which are substitute goods to electric vehicles) will cause consumers to switch away from petrol cars, thereby increasing the demand for electric vehicles at every price level and shifting the demand curve to the right.

Award 1 mark for option D.

Price elasticity of supply is calculated as the percentage change in quantity supplied divided by the percentage change in price. Here, PES = 5% / 15% = 0.33. Since the calculated value is less than 1, the supply of coffee beans is inelastic.

Award 1 mark for option A.

In a market economy, there is minimal government intervention. Resources are allocated automatically through the price mechanism (the interaction of market forces of supply and demand) and are guided by consumer choices (consumer sovereignty).

Award 1 mark for option A.

External costs are negative impacts on third parties not involved in the economic transaction. Increased healthcare costs borne by general taxpayers to treat obesity and dental health issues caused by others drinking sugary soft drinks represent an external cost.

Award 1 mark for option C.

Commercial banks act as financial intermediaries for the general public, providing services like current accounts, savings deposit facilities, and personal loans directly to individual customers and businesses. The central bank deals with the government and other financial institutions.

Award 1 mark for option D.

A severe drought directly reduces the maximum potential production of agricultural crops, causing the axis intercept for agriculture to shift inwards. Conversely, a technological breakthrough in manufacturing increases its maximum potential output, causing the axis intercept for manufacturing to shift outwards. Thus, the PPC pivots.

1 mark for the correct answer C.

A subsidy to manufacturers increases supply (shifts the supply curve to the right), which tends to lower price and increase quantity. A rise in petrol prices makes petrol cars more expensive to run, causing consumers to switch to substitutes like electric vehicles, thereby increasing demand (shifting the demand curve to the right). This demand shift tends to raise price and increase quantity. Since both shifts increase quantity, the equilibrium quantity definitely rises. However, since the supply shift lowers price and the demand shift raises price, the overall effect on the equilibrium price depends on the relative magnitudes of the shifts and is therefore uncertain.

1 mark for the correct answer C.

The nominal wage is the actual face value of the wages received, which increased by 4%. The real wage represents the purchasing power of the wage, which is adjusted for inflation. Since the rate of inflation (6%) is higher than the nominal wage increase (4%), the purchasing power of the worker's income has fallen, meaning the real wage decreased.

1 mark for the correct answer C.

Contractionary fiscal policy aims to reduce aggregate demand. This is achieved by reducing government spending (which directly reduces the government component of aggregate demand) and/or increasing personal income tax (which reduces consumers' disposable income, thereby reducing consumer spending).

1 mark for the correct answer B.

Deflation is a sustained decrease in the general price level. When prices are falling, consumers often postpone purchasing non-essential goods and services because they expect them to be cheaper in the future. This delay in consumption can lead to reduced aggregate demand, further economic slowdown, and a deflationary spiral. The real value of debt increases (not decreases), exports tend to become more (not less) competitive as domestic prices fall, and real wages rise without nominal increases, so workers do not need to demand higher nominal wages to maintain living standards.

1 mark for the correct answer A.

The Human Development Index (HDI) is a composite index that measures development based on three dimensions: long and healthy life (measured by life expectancy at birth), knowledge/education (measured by mean and expected years of schooling), and a decent standard of living (measured by GNI per capita at purchasing power parity).

1 mark for the correct answer B.

An import quota restricts the quantity of imports but does not generate direct revenue for the government. Replacing it with an equivalent tariff—which keeps the import volume and price levels identical—allows the government to collect tariff duties (tax revenue) on each imported unit. The quota rents that previously went to foreign exporters or import license holders are now captured by the government as tax revenue.

1 mark for the correct answer A.

The Marshall-Lerner condition states that a currency depreciation or devaluation will improve the current account balance only if the sum of the price elasticities of demand for exports and imports (in absolute terms) is greater than one (\(|PED_x| + |PED_m| > 1\)). If the sum is less than one, the trade balance will deteriorate.

1 mark for the correct answer C.

A permanent destruction of productive assets (like factories and transport networks) reduces the maximum potential productive capacity of the economy. This is represented by an inward shift of the PPC.

1 mark for the correct option B.

Percentage change in price is \(((10 - 8) / 8) \times 100 = 25\%\). Percentage change in quantity demanded is \(((120 - 200) / 200) \times 100 = -40\%\). Price elasticity of demand (PED) is calculated as: \(PED = -40\% / 25\% = -1.6\).

1 mark for the correct option A.

An improvement in working conditions and non-wage benefits makes the job more attractive, which encourages more workers to offer their services, thereby increasing the supply of labour to that occupation.

1 mark for the correct option C.

At an output of 0 units, the total cost is $100, which represents the total fixed cost (TFC) since no variable costs are incurred at zero production. Because fixed costs do not vary with output, the TFC remains $100 at 20 units. The average fixed cost (AFC) is: \(AFC = TFC / Output = 100 / 20 = \$5\).

1 mark for the correct option B.

This is structural unemployment. It occurs when there is a mismatch between the skills of the unemployed and the skills needed for available jobs, caused by structural declines in specific long-standing industries.

1 mark for the correct option D.

The CPI rose from 105 to 108, which means the overall price level rose. However, the inflation rate in Year 2 was 5% \(((105-100)/100)\), while in Year 3 it was approximately 2.86% \(((108-105)/105)\). Therefore, the rate of inflation decreased.

1 mark for the correct option C.

The current account balance is computed as: Balance of Trade in Goods + Balance of Trade in Services + Primary Income Balance + Secondary Income Balance. Balance of goods = \(50 - 65 = -15\). Balance of services = \(30 - 20 = +10\). Total current account balance = \(-15 + 10 - 5 + 2 = -8\) (deficit of $8bn).

1 mark for the correct option B.

A reduction in tariffs on imported cars lowers the trade barriers and direct tax cost on importations, which causes the price of imported vehicles in the domestic market to fall.

1 mark for the correct option B.

An increase in the qualifications and training required for a job restricts the supply of labor to that market. This leftward shift of the labor supply curve results in a higher equilibrium wage rate.

Award 1 mark for the correct option (B).
Reject all other options.

The Human Development Index (HDI) is composed of three dimensions: health (measured by life expectancy), education (measured by mean/expected years of schooling), and standard of living (measured by GNI/GDP per capita). Reducing infant mortality improves life expectancy, which enhances the health component. Increasing adult literacy improves the education component. Since real GDP per head is unchanged, only the health and education components will improve.

Award 1 mark for the correct option (C).
Reject all other options.

Removing a tariff on imports lowers the barrier to trade, reducing the cost of imported goods. This causes the domestic price of electric cars to fall, leading to an increase in imports and consumer demand, whilst domestic production is likely to contract.

Award 1 mark for the correct option (B).
Reject all other options.

An increase in interest rates by the central bank makes saving in domestic currency accounts more attractive. This causes international 'hot money' to flow into the country, increasing the demand for the domestic currency on foreign exchange markets, leading to an appreciation of the exchange rate.

Award 1 mark for the correct option (C).
Reject all other options.

A PED of \(-0.4\) is price inelastic (absolute value is less than 1). When the price of an inelastic good rises, the percentage decrease in quantity demanded is smaller than the percentage increase in price. Consequently, total revenue will increase.

Award 1 mark for the correct option (B).
Reject all other options.

A natural disaster reduces the quantity and quality of a country's factors of production (capital infrastructure and land). Since the maximum potential output of both agricultural and manufactured goods is reduced, the entire production possibility curve (PPC) will shift inwards.

Award 1 mark for the correct option (C).
Reject all other options.

To calculate the unemployment rate, divide the number of unemployed people by the total labour force and multiply by 100:

$$\text{Unemployment Rate} = \left( \frac{240,000}{1,200,000} \right) \times 100 = 20\%$$

1 mark for the correct calculation: 20% (Accept 20 without %).

According to the extract, the factors contributing to Zambia's high population growth rate are: (1) a high birth rate, (2) a falling death rate, and (3) positive net migration.

Award 1 mark for each of any two correct reasons identified from the extract, up to a maximum of 2 marks: - High birth rate (1) - Falling death rate (1) - Positive net migration / immigration (1)

A government subsidy is a financial grant given to producers. When the Moroccan government provides subsidies to solar panel manufacturers:
1. It lowers their costs of production.
2. This encourages manufacturers to increase production, shifting the supply curve to the right and lowering the market price of solar panels.
3. Consequently, consumers are more willing and able to purchase solar panels, leading to an increase in the quantity demanded.

Award up to 3 marks as follows:
- 1 mark for identifying that the subsidy reduces the cost of production for manufacturers.
- 1 mark for explaining that this increases the supply / shifts the supply curve to the right / lowers the price.
- 1 mark for explaining that it leads to an increase in the quantity demanded / consumption of solar panels.

Interest rates represent the cost of borrowing money. If the central bank increases interest rates:
1. The cost of borrowing funds for wind energy firms rises.
2. This reduces the expected profitability of investment projects, as a larger portion of revenue must go toward interest payments.
3. As a result, wind energy firms are discouraged from taking out loans to buy new capital equipment (such as wind turbines), leading to a decline in overall investment.

Award up to 3 marks as follows:
- 1 mark for identifying that higher interest rates increase the cost of borrowing / loans.
- 1 mark for explaining that this reduces the profitability of investment projects / increases the cost of purchasing capital equipment (e.g., wind turbines).
- 1 mark for explaining that this leads to a decrease in the level of investment by wind energy firms.

An increase in the wages of bakers represents a rise in the cost of production for bread manufacturers. This causes the supply curve to shift to the left (from S₁ to S₂). As a result, the market price increases from P₁ to P₂ and the quantity traded decreases from Q₁ to Q₂.

Award marks as follows:
- Axes correctly labelled (price and quantity or p and q): 1 mark
- Original demand and supply curves correctly labelled: 1 mark
- New supply curve shifted to the left: 1 mark
- Original and new equilibriums clearly shown by lines (P₁, Q₁ and P₂, Q₂) or points (E₁ and E₂) indicating higher price and lower quantity: 1 mark

To answer this question successfully, candidates should examine the data in Table 1.2 and follow these steps:

1. **Identify the expected relationship (1 mark):** State that there is a positive/direct relationship (i.e., as income rises, leisure travel spending generally rises).
2. **Provide supporting evidence (1 mark):** Quote specific figures from the table showing this trend (e.g., between 2017 and 2019, income rose from $2,500 to $2,900, while travel spending increased from $120 to $160).
3. **Analyse the expected relationship (1 mark):** Explain why this happens (e.g., higher incomes increase disposable/discretionary income, and leisure travel is a luxury/income-elastic service).
4. **Identify the exception (1 mark):** Note that in 2021, the relationship was inverse/anomalous (income rose from $2,600 to $3,000, but travel spending fell from $90 to $70).
5. **Analyse the exception (1 mark):** Suggest a logical reason for this anomaly (e.g., travel restrictions, fear of disease/lockdowns, or inflation in essentials).

**Expected relationship (up to 3 marks):**
* **Identification:** Generally, there is a positive / direct relationship (1)
* **Supporting evidence:** From 2017 to 2019, average monthly household income rose from $2,500 to $2,900 and average monthly spending on leisure travel rose from $120 to $160 (1)
* **Analysis:** An increase in income raises household purchasing power / disposable income, allowing them to spend more on luxury/non-essential services like travel (1)

**Exception (up to 2 marks):**
* **Identification of exception:** In 2021, household income rose (from $2,600 to $3,000) but leisure travel spending decreased (from $90 to $70) (1)
* **Analysis of exception:** This could be due to non-income factors such as border closures / health concerns / inflation on essential goods which limited travel opportunities despite higher incomes (1)

An increase in the retirement age in Costa Rica could benefit the economy by keeping older, experienced workers in the active labour force for longer. This increases the nation's productive capacity and can boost GDP growth. Additionally, the government will spend less on state pension payouts and collect more income tax revenue, allowing it to reallocate funds to other public services or infrastructure projects. However, it may not benefit the economy if it reduces job opportunities for younger workers, leading to higher youth unemployment. Older workers might also have lower physical capability or outdated skills, which could lower productivity in certain sectors unless costly retraining is provided. Furthermore, forcing people to work longer may lead to increased health issues, raising national healthcare expenditure.

Award up to 4 marks for logical reasons why it might benefit Costa Rica's economy (maximum of 4 marks): - Increases the size of the active labour force (1), which increases productive capacity / GDP (1). - Decreases government spending on state pensions (1), allowing government to spend on other areas (1). - Increases tax revenue (1), as workers pay income tax for longer (1). - Utilises the skills and experience of older workers (1), which can support productivity (1). Award up to 4 marks for logical reasons why it might not benefit Costa Rica's economy (maximum of 4 marks): - May reduce job vacancies for younger workers (1), increasing youth unemployment (1). - Older workers may have lower physical capacity or outdated skills (1), which could reduce average productivity or increase training costs (1). - May lead to higher healthcare costs for the government (1) if working longer worsens health (1). - May reduce the well-being / quality of life of older citizens (1) due to less leisure time (1).

An increase in tourism can improve Mauritius's current account balance as tourism is classified as a service export (a credit item). More high-spending international visitors will directly increase export revenue, which, other things being equal, will reduce a current account deficit or move it towards a surplus. However, it may not improve the current account balance if the expansion of tourism requires a substantial increase in imports. Mauritius relies on imported food, fuel, and capital equipment to build and run hotels, which increases import expenditure (a debit item). Additionally, foreign-owned hotel chains may send their profits back to their home countries, worsening the primary income balance, which is also part of the current account.

Award up to 4 marks for logical reasons why it might improve Mauritius's current account balance (maximum of 4 marks): - Tourism is a service export / credit item on the current account (1). More tourists increase export revenue from services (1). - This improves the trade in services balance (1), which can reduce a current account deficit (1). Award up to 4 marks for logical reasons why it might not improve Mauritius's current account balance (maximum of 4 marks): - Tourism development requires more imports of food, fuel, and capital goods (1), increasing import expenditure / debit items (1). - Foreign-owned hotels may repatriate profits (1), worsening the primary income account (1). - Higher incomes from tourism could lead to local residents spending more on imported consumer goods (1).

Opportunity cost is the benefit or value of the next best alternative that is given up (foregone) when a decision or choice is made between mutually exclusive options.

1 mark for identifying that it is the 'next best alternative'. 1 mark for stating that this alternative is 'foregone', 'given up', or 'sacrificed'.

Fiscal policy is a government policy that uses taxation and government spending to influence aggregate demand and the level of economic activity in the country.

1 mark for mentioning 'government spending and taxation (or taxes)'. 1 mark for mentioning 'to influence economic activity or aggregate demand or the economy'.

Price elasticity of demand (PED) is a measure of the responsiveness of quantity demanded of a good or service to a change in its price, calculated as the percentage change in quantity demanded divided by the percentage change in price.

2 marks for a full definition: 'the responsiveness of quantity demanded to a change in price' OR the formula: '% change in quantity demanded / % change in price'. 1 mark for a partial definition, such as mentioning the relationship between change in demand and change in price without specifying responsiveness or percentage change.

A trade union's bargaining power depends on several factors. First, if the union represents a large majority of the workers (high union density), it can threaten a strike, which would halt production and cause financial loss to the employer, thereby increasing the likelihood of securing a wage rise. Second, if the productivity of the workers has increased, the firm's revenue per worker rises. This makes the employer more able and willing to share these gains with the workers through higher wages. Other reasons include a low level of unemployment in the industry or inelastic demand for the firm's product, enabling the firm to pass the wage increase onto consumers.

Award 1 mark for each of two reasons identified and 1 mark for each of two explanations. Reasons and explanations include: - High union density (1) which gives the union stronger bargaining power (1). - High labour productivity (1) which increases the firm's revenue, making employers more willing to pay (1). - Price inelastic demand for the final product (1) meaning the firm can easily pass on higher wage costs to consumers in the form of higher prices (1). - Shortage of labor in the industry (1) making it difficult for the employer to find alternative non-union workers (1).

When a country's exchange rate falls, its currency depreciates. This means foreign buyers need less of their own currency to purchase the domestic currency, making the country's exports cheaper in foreign markets. As a result, the quantity demanded of exports will increase, raising export revenue (assuming demand is price elastic). Conversely, it takes more of the weaker domestic currency to buy foreign goods, making imports more expensive for domestic consumers. This reduces the quantity demanded of imports and lowers import expenditure. The combination of increased export revenue and decreased import expenditure reduces the trade deficit, thereby lowering the current account deficit.

Award 4 marks for a logical explanation: - A fall in the exchange rate (currency depreciation) makes exports cheaper in foreign currency (1). - This leads to an increase in the demand/revenue for exports (1). - It also makes imports more expensive in the domestic currency (1). - This leads to a decrease in the demand/expenditure for imports (1) which improves the trade balance/reduces the current account deficit.

A low and stable rate of inflation provides stability and predictability. First, it boosts business confidence because firms can accurately predict their future costs (e.g., raw materials and wages) and revenues. This encourages long-term capital investment, which increases the economy's productive capacity. Second, it maintains the international price competitiveness of the country's exports. If domestic prices are rising slowly while foreign prices are rising quickly, exports become relatively cheaper and imports relatively more expensive. This increases export demand, supports domestic employment, and improves the balance of trade.

Award 1 mark for each of two benefits identified and 1 mark for each of two explanations. - Encourages investment / business confidence (1) because future costs, prices, and profits are more predictable, reducing risk (1). - Enhances international competitiveness of exports (1) because domestic prices rise more slowly than in competing nations, increasing foreign demand for exports (1). - Protects real incomes / purchasing power (1) ensuring that consumers (especially those on fixed incomes) can maintain their standard of living (1). - Prevents wage-price spirals (1) reducing the likelihood of costly industrial disputes or excessive wage demands (1).

A trade union can negotiate higher wages using collective bargaining. When union density is high, the union has more bargaining power because it represents a large percentage of the workforce. If the employer refuses to raise wages, the union can threaten industrial action, such as a strike. This would halt transport operations, causing a major loss of revenue and profit for the transport firm, forcing them to compromise. Furthermore, if workers have high productivity, the union can argue that the firm's output and profits are rising, justifying a wage increase. If demand for public transport is price inelastic, the firm can easily pass higher wage costs onto commuters via higher ticket prices, making them more willing to agree to the union's demands.

Up to 6 marks for coherent analysis: Collective bargaining represents workers as a single group, increasing their bargaining power (1 mark). High union density or membership percentage makes the threat of industrial action more credible (1 mark). Industrial action, such as strikes, disrupts production and operations, causing financial loss to the firm (1 mark). Rising labour productivity can be used as leverage to justify wage increases (1 mark). High profits within the firm indicate an ability to pay higher wages (1 mark). Inelastic demand for the firm's product allows the firm to pass on wage costs to consumers through higher prices, making it easier to grant raises (1 mark).

High inflation causes the average price level of domestically produced goods and services to rise rapidly. This makes a country's exports more expensive in foreign markets. As a result, foreign consumers will reduce their demand for these exports, choosing cheaper alternatives from other nations instead. At the same time, because domestic prices are rising, imported goods from abroad become relatively cheaper and more attractive to domestic consumers. This leads to a rise in import spending, which, combined with falling export revenue, worsens the current account balance of the balance of payments. Additionally, persistently high inflation increases domestic production costs (such as wages and raw materials), which may discourage foreign direct investment (FDI), further reducing the country's productivity and long-term competitiveness.

Up to 6 marks for coherent analysis: High inflation raises the prices of domestic goods and services (1 mark). This makes exports more expensive for foreign buyers, leading to a fall in export demand (1 mark). Imports become relatively cheaper and more attractive compared to domestic goods (1 mark), increasing import spending (1 mark). The combination of falling exports and rising imports worsens the current account of the balance of payments (1 mark). Rising domestic costs, such as wages and materials, squeeze profit margins of domestic firms (1 mark). Unstable high inflation discourages foreign direct investment (FDI), limiting future productivity improvements (1 mark).

Price elasticity of demand (PED) measures the responsiveness of quantity demanded to a change in price. When the government imposes an indirect tax, the supply curve shifts left, raising the price paid by consumers. If demand is price inelastic (PED < 1), consumers are not very responsive to price changes, meaning that quantity demanded will fall by a smaller percentage than the price increase. Consequently, the government will collect a large amount of tax revenue because sales volume remains high. Furthermore, consumer expenditure on the taxed good will rise because the higher price outweighs the small reduction in quantity bought. Conversely, if demand is price elastic (PED > 1), consumers are highly responsive, and a tax-induced price increase causes a larger percentage drop in quantity demanded. In this case, government tax revenue will be relatively low because consumers switch to substitutes, and consumer expenditure on this specific good will fall.

Up to 6 marks for coherent analysis: Define price elasticity of demand (PED) as the responsiveness of quantity demanded to a change in price (1 mark). An indirect tax shifts the supply curve to the left, raising the market price (1 mark). If demand is price inelastic (PED < 1), quantity demanded falls by a smaller percentage than the price rise (1 mark). Inelastic demand leads to a significant increase in government tax revenue (1 mark) and an increase in total consumer expenditure on the good (1 mark). If demand is price elastic (PED > 1), quantity demanded falls by a larger percentage than the price rise (1 mark), which leads to a smaller increase or potential fall in government tax revenue and a decrease in total consumer expenditure on the good (1 mark).

An increase in trade union membership may benefit an economy in several ways. Firstly, trade unions have strong collective bargaining power, allowing them to secure higher wages for workers. This can reduce income inequality, lift low-paid workers out of poverty, and increase disposable income, which boosts consumer spending and drives economic growth. Secondly, unions often negotiate for safer working environments and better training, which can improve worker morale, reduce staff turnover, and increase labor productivity. Higher productivity benefits firms by lowering average costs in the long run. On the other hand, a rise in trade union membership might not benefit an economy. If unions demand wage increases that exceed productivity growth, firms will face higher labor costs. To maintain profit margins, firms may increase prices, leading to cost-push inflation, or lay off workers, causing unemployment. Higher domestic prices can also make exports less competitive abroad, worsening the current account balance. Furthermore, if unions engage in industrial action, such as strikes, it can disrupt production, reduce GDP, and discourage foreign direct investment.

Level 3 (6-8 marks): A reasoned and balanced discussion that explains both the potential benefits (e.g., higher wages, improved productivity, reduced inequality) and potential drawbacks (e.g., wage-price spiral, unemployment, cost-push inflation, industrial action) of an increase in trade union membership, supported by relevant economic theory. Level 2 (3-5 marks): A one-sided discussion that details only the benefits or only the drawbacks, or a two-sided discussion that lacks economic depth and clear explanations. Level 1 (1-2 marks): Simple statements or definitions relating to trade unions without any real evaluation of their impact on the economy. Level 0 (0 marks): No creditable content.

There are several reasons why a government should protect its domestic industries. Firstly, protectionist measures like tariffs and quotas can shield young 'infant' industries from intense foreign competition. This gives them time to grow, achieve economies of scale, and eventually compete on a global level. Secondly, it protects domestic jobs from being lost to cheaper foreign competitors, preventing structural unemployment. It can also help reduce a current account deficit by making imports more expensive, thereby discouraging import spending. Finally, it prevents dumping, where foreign firms sell goods below cost to destroy local competition. Conversely, there are strong arguments against protectionism. Restricting trade means domestic consumers face higher prices and a narrower choice of goods. Without foreign competition, domestic firms have less incentive to innovate, improve quality, or reduce costs, leading to long-term economic inefficiency. Furthermore, other countries are likely to retaliate by placing tariffs on the protecting nation's exports, which harms domestic exporters and can worsen the current account balance while damaging international relations.

Level 3 (6-8 marks): A balanced discussion examining both the arguments for protectionism (infant industry argument, job preservation, preventing dumping) and against protectionism (higher prices, lack of efficiency, retaliation risk), using clear economic terminology. Level 2 (3-5 marks): A one-sided analysis focusing only on the benefits or only on the drawbacks of protectionism, or a two-sided response that lacks sufficient depth or explanation. Level 1 (1-2 marks): Basic identification of trade barriers or protectionism with no real analysis. Level 0 (0 marks): No creditable content.

A rise in interest rates is a traditional tool to reduce demand-pull inflation. Higher interest rates make borrowing more expensive for households and firms. This discourages taking out loans for large purchases, such as housing and consumer durables, thereby reducing consumer spending. It also raises the cost of investment loans, leading firms to cut back on expansion projects. Additionally, higher interest rates encourage saving rather than spending, because the financial return on savings accounts is greater. This combination of lower consumption and investment reduces aggregate demand, which helps cool the economy and slow down price rises. However, raising interest rates may not always succeed in reducing inflation. If the inflation is cost-push (caused by rising global energy prices or supply chain disruptions), higher interest rates do not solve the root supply-side issues and might even increase firms' costs further. There is also a significant time lag, often taking up to two years for interest rate changes to fully impact economic activity. Furthermore, if consumer confidence remains very high, spending may not fall. Finally, if interest rates are raised too high, it could trigger a recession, leading to business closures and high unemployment.

Level 3 (6-8 marks): A clear, balanced discussion of how higher interest rates can reduce demand-pull inflation (through borrowing costs, consumption, investment, and saving incentives) and why they might fail or cause negative consequences (cost-push issues, time lags, impact on economic growth, confidence levels). Level 2 (3-5 marks): A one-sided argument explaining only how interest rates reduce inflation, or a two-sided discussion that lacks analytical depth or fails to distinguish between demand-pull and cost-push inflation. Level 1 (1-2 marks): Simple statements about interest rates or inflation with no logical chain of reasoning. Level 0 (0 marks): No creditable content.