2026 Cambridge IAS-Level Economics (9708) Practice Paper with Answers

The formula for cross elasticity of demand is:
\[\text{XED} = \frac{\%\Delta Q_d \text{ of good X}}{\%\Delta P \text{ of good Y}}\]
Given \(\text{XED} = +1.5\) (indicating goods X and Y are substitutes) and \(\%\Delta P_Y = -10\%\):
\[+1.5 = \frac{\%\Delta Q_d \text{ of good X}}{-10\%}\]
\[\%\Delta Q_d \text{ of good X} = 1.5 \times (-10\%) = -15\%\]
Because the price of good X has not changed, the entire demand curve for good X shifts to the left, causing quantity demanded to fall by 15% at the current price.

B is correct. \(\text{XED} = \%\Delta Q_d(X) / \%\Delta P(Y) = +1.5\). With \(\%\Delta P(Y) = -10\%\), \(\%\Delta Q_d(X) = -15\%\). A positive XED denotes substitute goods, so a cheaper substitute causes demand for X to decrease.

When demand is perfectly inelastic (\(\text{PED} = 0\)), consumers are completely unresponsive to price changes. The supply curve shifts vertically upwards by the amount of the specific tax ($4). Because the demand curve is vertical, the equilibrium market price rises by the full amount of the tax ($4), meaning the tax incidence falls entirely on the consumer. Since demand is vertical, the quantity demanded does not change at all (change in equilibrium quantity is zero).

A is correct. With perfectly inelastic demand (\(\text{PED} = 0\)), the full burden of an indirect tax is shifted onto consumers (consumer pays 100%, producer pays 0%), and equilibrium quantity remains unchanged.

Government spending (\(G\)) is an injection and a key component of Aggregate Demand (\(\text{AD} = C + I + G + (X - M)\)). An increase in \(G\) shifts the AD curve to the right. In the short run, along an upward-sloping Short-Run Aggregate Supply (SRAS) curve, an increase in AD leads to a higher equilibrium real output and a rise in the price level (demand-pull pressure).

C is correct. \(\Delta G > 0\) causes \(\text{AD}\) to shift rightward. Intersecting an upward-sloping SRAS curve, both real output and the price level increase.

In an open economy circular flow model, equilibrium national income occurs when total planned injections equal total planned leakages (withdrawals):
\[\text{Injections} (J) = \text{Leakages} (W)\]
\[I + G + X = S + T + M\]
Given:
\(S = \$40\text{bn}\), \(T = \$35\text{bn}\), \(M = \$25\text{bn}\)
Total leakages \(W = 40 + 35 + 25 = \$100\text{bn}\).

Injections are:
\(G = \$30\text{bn}\), \(X = \$28\text{bn}\), \(I = ?\)
\[I + 30 + 28 = 100\]
\[I + 58 = 100\]
\[I = 100 - 58 = \$42\text{bn}\]

D is correct. Equilibrium requires \(I + G + X = S + T + M\). Total leakages \(= 40 + 35 + 25 = 100\). Total injections must equal 100: \(I + 30 + 28 = 100 \implies I = 42\).

The Current Account Balance (CAB) is calculated as:
\[\text{CAB} = \text{Balance on trade in goods} + \text{Balance on trade in services} + \text{Primary income balance} + \text{Secondary income balance}\]

1. Balance on trade in goods \(= 140 - 175 = -35\text{bn}\)
2. Balance on trade in services \(= 65 - 50 = +15\text{bn}\)
3. Primary income balance \(= +12\text{bn}\)
4. Secondary income balance \(= -8\text{bn}\)

\[\text{CAB} = -35 + 15 + 12 - 8 = -16\text{bn}\]
Thus, there is a current account deficit of $16bn.

A is correct. Calculation: \((140 - 175) + (65 - 50) + 12 - 8 = -35 + 15 + 12 - 8 = -16\) (a deficit of $16bn).

Calculate the opportunity cost for each good in each country:

For Country X:
- Producing 40 solar panels costs 20 wind turbines \(\implies\) Opportunity cost of 1 solar panel = \(20 / 40 = 0.5\) wind turbines.
- Opportunity cost of 1 wind turbine = \(40 / 20 = 2\) solar panels.

For Country Y:
- Producing 30 solar panels costs 30 wind turbines \(\implies\) Opportunity cost of 1 solar panel = \(30 / 30 = 1\) wind turbine.
- Opportunity cost of 1 wind turbine = \(30 / 30 = 1\) solar panel.

Comparative advantage:
- Country X has a lower opportunity cost in producing solar panels (0.5 vs 1 wind turbine).
- Country Y has a lower opportunity cost in producing wind turbines (1 vs 2 solar panels).
Therefore, Country X should specialise in solar panels and Country Y in wind turbines.

B is correct. Opportunity cost of solar panels in X is 0.5 turbines, in Y is 1 turbine. Opportunity cost of wind turbines in X is 2 panels, in Y is 1 panel. Country X has comparative advantage in solar panels; Country Y has comparative advantage in wind turbines.

Supply-side policies aim to increase productive capacity and shift the LRAS curve to the right.
- Interventionist supply-side policies involve direct government funding, provision, or participation in the economy (such as state-funded retraining schemes, state investment in public infrastructure, and R&D subsidies).
- In contrast, reducing corporation tax, deregulating markets, and cutting union powers are market-based supply-side policies.

C is correct. Government-funded vocational training programs are interventionist because the state directly finances and organizes human capital development. Lowering taxes or deregulation are market-based measures.

In a pure planned economy, resource allocation is controlled entirely by the state. The central planning authority determines what goods and services to produce, how they are produced, and who receives them, rather than relying on consumer preferences or the price mechanism.

C is correct. In a command economy, state planners/central planning bodies decide production priorities and output quotas, whereas in market economies it is determined by price signals and consumer sovereignty.

To calculate the cross elasticity of demand (\(XED\)):

$$\text{Percentage change in price of good X} = \frac{16 - 20}{20} \times 100 = -20\%$$
$$\text{Percentage change in quantity demanded of good Y} = \frac{400 - 500}{500} \times 100 = -20\%$$
$$XED = \frac{\text{\% change in quantity demanded of Y}}{\text{\% change in price of X}} = \frac{-20\%}{-20\%} = +1.0$$

A positive \(XED\) value indicates that the two goods are substitutes because a fall in the price of good X leads to a decrease in the demand for good Y.

Award 1 mark for B.
Incorrect options:
- A (+1.0, complements): incorrect relationship; positive XED indicates substitutes.
- C (-1.0, complements): calculation error with signs.
- D (-1.0, substitutes): incorrect sign and contradictory classification.

The total government expenditure on a specific subsidy is calculated as:

$$\text{Total Subsidy Cost} = \text{Subsidy per unit} \times \text{New equilibrium quantity}$$
$$\text{Total Subsidy Cost} = \$4 \times 14\,000 = \$56\,000$$

Note: The subsidy is paid on all units produced and consumed at the new equilibrium, not just the additional units.

Award 1 mark for C.
Incorrect options:
- A ($16 000): incorrectly uses the change in quantity ($4 \times 4\,000$).
- B ($40 000): incorrectly uses the initial quantity ($4 \times 10\,000$).
- D ($84 000): combines subsidy rate incorrectly or calculates consumer savings.

1. An increase in investment increases Aggregate Demand (\(AD\)), shifting the \(AD\) curve to the right.
2. An improvement in total factor productivity increases productive capacity, shifting the Long-Run Aggregate Supply (\(LRAS\)) curve to the right.
3. Both shifts cause real output to increase unambiguously.
4. However, the rightward shift in \(AD\) exerts upward pressure on the price level, while the rightward shift in \(LRAS\) exerts downward pressure. Therefore, the net effect on the price level is uncertain without knowing the relative magnitudes of the shifts.

Award 1 mark for B.
Incorrect options:
- A: price level increase is not certain because the rightward shift of LRAS reduces price pressure.
- C: real output definitely rises, so it cannot be uncertain.
- D: real output must rise as both curves shift rightwards.

Calculate total planned leakages (\(W\)) and injections (\(J\)):

$$\text{Total Leakages } (W) = S + T + M = 120 + 180 + 90 = 390$$
$$\text{Total Injections } (J) = I + G + X = 140 + 160 + 110 = 410$$

Since \(J > W\) ($410 > $390), planned injections exceed planned leakages by $20 million. This net injection creates expansionary pressure, causing national income to rise.

Award 1 mark for A.
Incorrect options:
- B: while injections exceed leakages, the consequence is that national income rises, not falls.
- C: incorrect calculation of totals.
- D: incorrect calculation and incorrect direction of national income change.

Calculate opportunity costs:
- Country P: producing 60 coffee costs 30 sugar $\implies$ 1 coffee = 0.5 sugar; 1 sugar = 2 coffee.
- Country Q: producing 40 coffee costs 40 sugar $\implies$ 1 coffee = 1.0 sugar; 1 sugar = 1 coffee.

Comparison:
- For coffee: Country P (0.5 sugar) has a lower opportunity cost than Country Q (1 sugar). Country P has comparative advantage in coffee.
- For sugar: Country Q (1 coffee) has a lower opportunity cost than Country P (2 coffee). Country Q has comparative advantage in sugar.

Therefore, Country P should specialise in coffee and Country Q should specialise in sugar.

Award 1 mark for C.
Incorrect options:
- A: absolute advantage in coffee belongs to P, but Q should not produce coffee.
- B: reverses comparative advantages.
- D: ignores comparative cost differences.

The current account balance (\(CAB\)) is calculated as:

$$\text{Trade in goods balance} = 210 - 260 = -50$$
$$\text{Trade in services balance} = 95 - 70 = +25$$
$$\text{Primary income balance} = 45 - 55 = -10$$
$$\text{Secondary income balance} = 15 - 25 = -10$$
$$\text{Current Account Balance} = (-50) + (+25) + (-10) + (-10) = -45\text{ billion}$$

Thus, the current account is in a deficit of $45 billion.

Award 1 mark for D.
Incorrect options:
- A: calculated by taking goods balance only ($-50$) or miscalculating secondary flows.
- B: calculated by omitting secondary income flows ($-35$).
- C: calculated trade balance only (goods + services = $-25$).

In a pure planned (command) economy, the state owns all major factors of production (land and capital) and central planners determine what, how, and for whom goods and services are produced. The price mechanism does not allocate resources, and consumer sovereignty does not guide production decisions.

Award 1 mark for A.
Incorrect options:
- B: prices are determined by central directives, not supply and demand.
- C: consumer sovereignty is characteristic of market economies.
- D: profit motive is the driving force of private enterprise in market systems.

Interventionist supply-side policies involve direct government expenditure and involvement in the economy to enhance productive capacity, such as funding education, national apprenticeships, and skills training programs.

- Reducing corporation tax rates (A) and reducing unemployment benefits (C) are market-based supply-side policies.
- Lowering the central bank base interest rate (B) is an expansionary monetary policy.

Award 1 mark for D.
Incorrect options:
- A: market-based supply-side policy.
- B: monetary demand-management policy.
- C: market-based supply-side policy designed to sharpen work incentives.

In a free market economy, resource allocation and the distribution of output are determined by the price mechanism and the effective demand of consumers. Goods and services are allocated to individuals who have both the willingness and the financial ability (purchasing power) to pay for them.

B is correct [1 mark]. Option A applies to a centrally planned economy. Option C involves direct administrative rationing, characteristic of command systems. Option D describes a government intervention tool, not the primary market mechanism.

Percentage change in price of X = ((8 - 10) / 10) * 100 = -20%. Percentage change in quantity demanded of Y = ((350 - 500) / 500) * 100 = -30%. XED = (% change in quantity demanded of Y) / (% change in price of X) = (-30%) / (-20%) = +1.5. A positive cross elasticity of demand indicates that goods X and Y are substitutes.

A is correct [1 mark]. Option B has an incorrect negative sign (which would denote complements). Options C and D invert the formula by dividing percentage change in price by percentage change in quantity demanded.

The relative incidence of an indirect tax depends on the relative elasticities of demand and supply. Since the price elasticity of demand (|PED| = 0.4) is more inelastic than the price elasticity of supply (PES = 1.8), consumers are less responsive to price changes than producers. Therefore, the greater share (burden) of the tax is passed on to consumers.

B is correct [1 mark]. Option A is incorrect because the entire burden falls on consumers only if demand is perfectly inelastic (PED = 0) or supply is perfectly elastic. Option C is incorrect because producers pay more only when supply is more inelastic than demand. Option D requires equal elasticities.

An increase in the price of imported raw materials raises costs of production, shifting the short-run aggregate supply (SRAS) curve to the left, which increases the price level and decreases real GDP. An increase in government expenditure shifts the aggregate demand (AD) curve to the right, which increases both the price level and real GDP. Because both shifts increase the price level, the general price level definitely rises. However, the net effect on real GDP depends on the relative magnitudes of the two shifts, making the impact on real GDP uncertain.

C is correct [1 mark]. Option A (AD right, SRAS right) leads to an uncertain price level and definite GDP increase. Option B (SRAS right, AD left) leads to a definite fall in price level. Option D (AD left, SRAS left) leads to a definite fall in real GDP and uncertain price level.

In the circular flow of income for an open economy with a government sector, macroeconomic equilibrium occurs when total leakages (withdrawals) equal total injections. Total leakages comprise Savings (S), Taxation (T), and Imports (M). Total injections comprise Investment (I), Government spending (G), and Exports (X). Hence, the equilibrium condition is S + T + M = I + G + X.

C is correct [1 mark]. Option A ignores government leakages and injections (T and G). Option B pairs a leakage and an injection on both sides incorrectly. Option D omits foreign trade and misclassifies consumption.

Interventionist supply-side policies involve direct government funding, provision, or involvement to correct market deficiencies and increase long-run aggregate supply (LRAS). Directly funding vocational training apprenticeships improves human capital and labour productivity. In contrast, reducing corporation tax and market deregulation are market-based supply-side policies, while lowering base interest rates is monetary policy.

C is correct [1 mark]. Option A is a market-based supply-side policy. Option B is a market-based supply-side policy (deregulation). Option D is an expansionary monetary policy tool.

Opportunity cost of 1 unit of Cloth: in Country X = 40 / 20 = 2 units of Wheat; in Country Y = 30 / 30 = 1 unit of Wheat. Country Y has a lower opportunity cost in producing Cloth (1 Wheat < 2 Wheat), giving it a comparative advantage in Cloth. Country X has an opportunity cost of 1 unit of Wheat = 20 / 40 = 0.5 Cloth, compared to Country Y's 1 Cloth, so Country X has a comparative advantage in Wheat.

B is correct [1 mark]. Option A is incorrect because Country X only has an absolute advantage in Wheat (40 > 30), not Cloth (20 < 30). Option C gives the opportunity cost for Wheat, not Cloth. Option D is incorrect as comparative advantage enables mutually beneficial trade even when one country has an absolute advantage in a good.

Trade in goods balance = $140bn - $160bn = -$20bn. Trade in services balance = $55bn - $40bn = +$15bn. Balance on trade in goods and services = -$20bn + $15bn = -$5bn. Current account balance = Balance on goods and services + Net primary income + Net secondary income = -$5bn + (-$15bn) + (-$5bn) = -$25bn (a deficit of $25bn).

A is correct [1 mark]. Option B calculates the balance on goods and net primary income incorrectly. Option C calculates only the balance on trade in goods and services (-$5bn), omitting primary and secondary income. Option D incorrectly treats debits as credits.

1. Effect of the price change of good Y on good X:
\(\text{XED} = \frac{\% \Delta Q_X}{\% \Delta P_Y} \implies \% \Delta Q_X = \text{XED} \times \% \Delta P_Y = +1.5 \times (+10\%) = +15\%\).

2. Effect of the own-price change of good X on good X:
\(\text{PED} = \frac{\% \Delta Q_X}{\% \Delta P_X} \implies \% \Delta Q_X = \text{PED} \times \% \Delta P_X = -0.8 \times (-5\%) = +4\%\).

3. Total expected percentage change in quantity demanded of good X:
\(+15\% + (+4\%) = +19\%\).

C is correct [1 mark].
- A is incorrect: calculates \(-15\% + 4\% = -11\%\) (misinterpreting sign of XED).
- B is incorrect: calculates \(+15\% - 4\% = +11\%\) (treating PED as reducing demand when price falls).
- D is incorrect: incorrectly calculates own-price effect as \(8\%\) and adds to \(15\%\).

A maximum price set below equilibrium creates a shortage equal to \(Q_D - Q_S\).
- When price falls, quantity demanded expands and quantity supplied contracts.
- If demand is highly price elastic, the decrease in price causes a large increase in \(Q_D\).
- If supply is highly price elastic, the decrease in price causes a large decrease in \(Q_S\).
- Therefore, the gap \((Q_D - Q_S)\) is maximised when both demand and supply are highly elastic.

A is correct [1 mark].
- B is incorrect: inelastic supply limits the contraction in quantity supplied, resulting in a smaller shortage.
- C is incorrect: inelastic demand limits the expansion in quantity demanded, resulting in a smaller shortage.
- D is incorrect: both inelastic demand and inelastic supply minimise the shortage created by the price ceiling.

1. An increase in labour productivity reduces unit labour costs and increases productive efficiency, shifting the short-run aggregate supply (SRAS) curve to the right. This puts downward pressure on the price level and increases real output.
2. A fall in consumer confidence reduces consumer expenditure (C), shifting the aggregate demand (AD) curve to the left. This puts downward pressure on the price level and reduces real output.
3. Combining both shifts:
- Price level: Both shifts exert downward pressure, so the price level unambiguously falls.
- Real output: SRAS shifting right increases output, while AD shifting left decreases output. Without knowing the relative magnitude of the shifts, the net effect on real output is uncertain.

B is correct [1 mark].
- A is incorrect: real output only rises if the SRAS shift is larger than the AD shift.
- C is incorrect: the price level unambiguously falls, not uncertain.
- D is incorrect: price level falls, not rises.

In the circular flow of income:
- Injections are \(J = I + G + X\) (Investment, Government spending, Exports).
- Leakages (withdrawals) are \(W = S + T + M\) (Savings, Taxation, Imports).

National income rises when injections increase and/or withdrawals decrease.
- An increase in exports (\(X \uparrow\)) increases injections.
- A decrease in taxation (\(T \downarrow\)) decreases leakages.
Both changes act in the same direction to expand the circular flow of income.

B is correct [1 mark].
- A is incorrect: higher savings (leakage) and lower government spending (injection) will reduce national income.
- C is incorrect: higher imports (leakage) and lower investment (injection) will reduce national income.
- D is incorrect: higher taxation is a leakage, which acts to reduce national income.

1. Opportunity cost ratios:
- Country X: 20 Cloth costs 40 Wheat \(\implies\) 1 unit of Cloth costs 2 units of Wheat.
- Country Y: 30 Cloth costs 15 Wheat \(\implies\) 1 unit of Cloth costs 0.5 units of Wheat.

2. Comparative advantage:
- Country Y has a comparative advantage in Cloth (lower opportunity cost: 0.5 Wheat < 2 Wheat).
- Country X has a comparative advantage in Wheat (lower opportunity cost: 0.5 Cloth < 2 Cloth).

3. Mutually beneficial terms of trade for Cloth:
\(0.5 \text{ units of Wheat} < 1 \text{ unit of Cloth} < 2.0 \text{ units of Wheat}\).

Among the options, only \(1.2 \text{ units of Wheat}\) falls within this range.

B is correct [1 mark].
- A is incorrect: at 0.4 units of Wheat, Country Y gives up 1 Cloth (worth 0.5 Wheat domestically) for only 0.4 Wheat, making Country Y worse off.
- C is incorrect: at 2.5 units of Wheat, Country X pays 2.5 Wheat for 1 Cloth (which it could produce domestically for 2 Wheat), making Country X worse off.
- D is incorrect: at 3.0 units of Wheat, Country X is worse off.

In a pure market economy:
- Resources are privately owned.
- Economic decisions are decentralised and guided by the price mechanism (rationing, signalling, and incentive functions).
- Self-interested consumers and producers determine what, how, and for whom to produce through market demand and supply (consumer sovereignty).
- There is no direct government intervention or central planning.

C is correct [1 mark].
- A is incorrect: state/collective ownership is a feature of a planned economy.
- B is incorrect: government production quotas and administrative price setting describe a planned economy.
- D is incorrect: direct provision of merit and public goods is a feature of mixed or planned economies; pure market economies experience non-provision of public goods.

1. Meaning of currency depreciation: A fall or decrease in the external value or purchasing power of a domestic currency against other foreign currencies, determined by market forces of demand and supply in a floating exchange rate system (1 mark).

2. Consequence for domestic manufacturing firms: Manufacturing firms that rely on imported inputs will experience higher input costs (cost-push pressures), leading to higher unit costs of production or reduced profit margins (1 mark).

- 1 mark for an accurate description of currency depreciation (a decrease in the external value/price of a currency in terms of another currency in a floating exchange rate regime).
Note: Do not accept simple statements such as 'money loses value' without reference to other currencies/foreign exchange market.
- 1 mark for stating a valid consequence for domestic manufacturing firms based on the text (e.g., higher costs of imported raw materials / increased cost of production / squeeze on profit margins).

1. Initial mechanism: Government funding for vocational training provides displaced or low-skilled workers with new, relevant technical skills and qualifications, which directly reduces occupational immobility.

2. Transmission to outcome: With updated skills that match the requirements of growing sectors, structurally unemployed individuals can successfully apply for and secure existing job vacancies, thereby lowering the level of structural unemployment.

Award marks as follows:
- 1 mark for explaining the initial mechanism (e.g. government training provides workers with updated/relevant skills OR improves the occupational mobility of labour).
- 1 mark for establishing the logical link to reducing structural unemployment (e.g. enabling unemployed workers to meet the requirements of available vacancies in expanding industries / bridging the skills gap).

Note: Do not award the second mark for a vague statement that 'employment increases' without linking it to the mismatch of skills/vacancies.

### Diagram:
- Axes: Vertical axis labelled Price (\(P\)) and horizontal axis labelled Quantity (\(Q\)).
- Curves: Initial downward-sloping demand curve (\(D_1\)) and upward-sloping supply curve (\(S_1\)) showing initial equilibrium (\(P_1, Q_1\)).
- Shifts: Rightward shift of supply from \(S_1\) to \(S_2\) and rightward shift of demand from \(D_1\) to \(D_2\), leading to a new equilibrium (\(P_2, Q_2\)) showing an increase in quantity from \(Q_1\) to \(Q_2\).

### Explanation and Analysis:
1. Effect of the subsidy: The unit subsidy provided to producers lowers the marginal and average costs of production, incentivising firms to supply more at every given price, shifting the market supply curve rightwards (\(S_1\) to \(S_2\)).
2. Effect of increased preference: The public information campaigns make consumers more willing and able to purchase solar panels at every price level, shifting the market demand curve rightwards (\(D_1\) to \(D_2\)).
3. Effect on equilibrium quantity: Both the rightward shift in demand and the rightward shift in supply exert upward pressure on output, resulting in an unambiguous increase in equilibrium quantity from \(Q_1\) to \(Q_2\).

### Consideration of Price Uncertainty:
- The final effect on equilibrium price is indeterminate without knowing the exact magnitudes of the shifts:
- If the rightward shift in supply is larger than the rightward shift in demand, excess supply at the original price pushes the equilibrium price downwards (\(P_2 < P_1\)).
- If the rightward shift in demand is larger than the rightward shift in supply, excess demand pushes the equilibrium price upwards (\(P_2 > P_1\)).
- If both shifts are identical in magnitude, the equilibrium price remains unchanged.

Diagram [1 mark]:
- 1 mark for a correctly labelled demand and supply diagram showing labelled axes (\(P\) and \(Q\)), rightward shift in supply (\(S_1\) to \(S_2\)), rightward shift in demand (\(D_1\) to \(D_2\)), and clear indication of initial and final equilibria.

Analysis [2 marks]:
- 1 mark for explaining that the subsidy lowers production costs, shifting the supply curve rightwards.
- 1 mark for explaining that greater consumer preference increases demand, shifting the demand curve rightwards, leading to an unambiguous increase in equilibrium quantity.

Consideration / Evaluation [1 mark]:
- 1 mark for explaining that the final effect on equilibrium price is uncertain/indeterminate because it depends on the relative magnitude of the shifts in demand and supply (e.g. price falls if \(\Delta S > \Delta D\), price rises if \(\Delta D > \Delta S\)).

Note: Do not award diagram mark if axes are unlabelled or incorrectly labelled (e.g. Inflation and Output).
Maximum of 3 marks if no diagram or an incorrect diagram is drawn.

### Analysis of Benefits (Arguments in favour)
- Reduction in Income Inequality and Poverty Alleviation: Raising the minimum wage directly increases the earnings of low-income workers, narrowing the wage gap and protecting purchasing power against the 6.2% inflation rate.
- Efficiency Wage Hypothesis & Productivity: Higher pay can improve worker motivation, reduce staff turnover and absenteeism, and encourage firms to invest in training and capital equipment, thereby boosting labour productivity.
- Stimulus to Aggregate Demand: Low-income earners have a high marginal propensity to consume (MPC). An increase in their disposable income raises consumer spending (
\(C\)), shifting aggregate demand (
\(AD\)) rightward and fostering economic growth.

### Analysis of Drawbacks (Arguments against)
- Risk of Real-Wage Unemployment: If the minimum wage is set above the market-clearing equilibrium wage and labour demand is relatively elastic, firms may reduce headcount or substitute labour with capital, causing unemployment in labour-intensive industries.
- Cost-Push Inflationary Pressures: Higher wage rates raise firms' unit costs of production. To maintain profit margins, firms may pass these costs on to consumers in the form of higher retail prices, triggering a wage-price spiral and worsening the existing 6.2% inflation rate.
- Loss of International Competitiveness: Escalating domestic labour costs can make exported goods more expensive relative to foreign rivals, worsening the balance of trade.

### Evaluative Conclusion
- The overall success depends heavily on the price elasticity of demand for goods in the affected sectors and the price elasticity of demand for labour (
\(PED_L\)). If productivity gains offset higher nominal wages (preventing unit labour costs from rising), the policy is likely to succeed. However, in an already inflationary environment (6.2%), without matching productivity increases, it risks fueling cost-push inflation and structural unemployment among the very workers it intends to help.

### AO2: Analysis (Up to 4 marks)
- Up to 3 marks for analysis of the benefits/positive impacts of increasing the national minimum wage (e.g., higher disposable income, poverty reduction, efficiency wage gains/higher productivity, boost to \(AD\) via consumption).
- Up to 3 marks for analysis of the drawbacks/negative impacts (e.g., rise in unit labour costs, potential unemployment if \(W > W_e\), cost-push inflation / wage-price spiral, loss of export competitiveness).
- Maximum of 4 marks for AO2 if only one side is addressed.

### AO3: Evaluation (Up to 2 marks)
- 1 mark for evaluative comments addressing key mitigating factors/conditions (e.g., elasticity of labour demand, magnitude of productivity offset, proportion of minimum wage workers in total workforce, prevailing inflation context).
- 1 mark for a clear, reasoned, and contextualised conclusion based on the preceding analysis.

Note: No marks for evaluation can be awarded if there is no two-sided analysis.

### Analysis of Tariff Effectiveness (Arguments in favour)
- Expenditure-Switching Effect: A 15% tariff increases the domestic price of imported manufactured goods. Assuming domestic substitutes are available, consumers will switch demand toward domestically produced alternatives, reducing the volume and value of imports (
\(M\)).
- Improvement in Trade Balance: A fall in import expenditure, ceteris paribus, narrows the deficit on the trade in goods balance, directly improving the current account balance.
- Government Revenue: Tariff collection generates fiscal revenue, which can be reinvested in domestic infrastructure or export subsidies.

### Analysis of Limitations / Adverse Effects (Arguments against)
- Retaliation by Trading Partners: Foreign nations affected by the tariffs may impose reciprocal tariffs on Terrania's exports, leading to a decline in export revenue (
\(X\)) and neutralizing any current account improvement.
- Price Elasticity of Demand (PED): If the demand for imported manufactured goods is price inelastic (
\(|PED| < 1\)), the 15% price rise will lead to a smaller percentage decrease in quantity demanded, causing total expenditure on imports to rise, worsening the current account deficit.
- Imported Cost-Push Inflation & Intermediate Inputs: Many manufactured goods or domestic producers rely on imported components. Tariffs raise production costs, making domestic output and exports less price-competitive globally.

### Evaluative Conclusion
- Tariffs may provide a temporary reduction in import expenditure in the short run, but they do not address underlying structural issues causing the current account deficit (such as poor domestic productivity or non-price uncompetitiveness). The policy is likely to fail in reducing the deficit in the long run if trading partners retaliate or if import demand is price inelastic; supply-side policies aimed at enhancing export competitiveness are generally more sustainable.

### AO2: Analysis (Up to 4 marks)
- Up to 3 marks for analysis of how tariffs can reduce the current account deficit (e.g., expenditure-switching mechanism, higher relative import prices, reduction in import volume \(M\), support for domestic substitute industries).
- Up to 3 marks for analysis of the drawbacks/reasons tariffs may fail (e.g., risk of foreign trade retaliation reducing \(X\), inelastic demand for imports causing import expenditure to rise, higher costs of imported intermediate components harming export competitiveness).
- Maximum of 4 marks for AO2 if only one side is analysed.

### AO3: Evaluation (Up to 2 marks)
- 1 mark for evaluative comments addressing critical conditions (e.g., PED of imports and exports / Marshall-Lerner condition, availability of domestic substitutes, short-run versus long-run effects).
- 1 mark for a supported, reasoned, and contextualised final judgement.

Note: Evaluation marks cannot be awarded without a balanced, two-sided analytical discussion.

### Knowledge and Understanding (AO1)
- Definition of Price Elasticity of Demand (PED): The numerical measure of the responsiveness of the quantity demanded of a good to a change in its price, calculated as:
\[ \text{PED} = \frac{\% \text{ change in quantity demanded}}{\% \text{ change in price}} \]
- Elastic vs Inelastic Demand: Demand is price elastic when the percentage change in quantity demanded is greater than the percentage change in price (\(|\text{PED}| > 1\)). Demand is price inelastic when the percentage change in quantity demanded is less than the percentage change in price (\(|\text{PED}| < 1\)).
- Key Determinants:
1. Availability and closeness of substitutes: The more substitutes available, the more elastic the demand.
2. Proportion of income spent on the good: Goods taking up a large fraction of consumer income tend to have more elastic demand.
3. Nature of the good (Necessity vs Luxury): Necessities and addictive goods tend to have inelastic demand, whereas luxuries tend to have elastic demand.
4. Time period: Demand is typically more inelastic in the short run and more elastic in the long run as consumers find alternatives.

### Analysis (AO2)
- How determinants influence elasticity:
- If a firm produces a good with many close substitutes (e.g., a specific brand of cereal), a small price increase causes consumers to switch to rival brands, making demand elastic.
- If a good has few or no substitutes and is an essential purchase (e.g., basic utilities or prescription medicine), consumers must continue buying even if the price rises, resulting in inelastic demand.
- Relationship between PED and Total Revenue (TR):
- \(\text{Total Revenue} (\text{TR}) = \text{Price} (P) \times \text{Quantity} (Q)\).
- **When demand is price elastic (\(|\text{PED}| > 1\)):** A decrease in price causes a proportionately larger increase in quantity demanded (\(\% \Delta Q_d > \% \Delta P\)), which increases total revenue.
- **When demand is price inelastic (\(|\text{PED}| < 1\)):** A decrease in price causes a proportionately smaller increase in quantity demanded (\(\% \Delta Q_d < \% \Delta P\)), which reduces total revenue. To raise total revenue for an inelastic good, the firm should increase the price.
- **When demand is unitary elastic (\(|\text{PED}| = 1\)):** A change in price leaves total revenue unchanged.

### Consideration / Evaluation (AO3)
- A firm should not always reduce price to increase revenue. The pricing strategy strictly depends on the PED coefficient of the product.
- If a firm reduces price when demand is inelastic, total revenue will fall, worsening the firm's financial position.
- In reality, estimating the exact PED coefficient is difficult because consumer tastes, competitor actions, and economic conditions fluctuate (ceteris paribus does not hold).
- Furthermore, maximizing total revenue does not necessarily maximize profit, as producing higher output to meet increased demand generates additional total costs.

AO1 Knowledge and Understanding (3 marks max):
- 1 mark: Accurate definition and/or formula of Price Elasticity of Demand (PED).
- 1 mark: Distinction between price elastic (\(|\text{PED}| > 1\)) and price inelastic (\(|\text{PED}| < 1\)) demand.
- 1 mark: Identification of at least two determinants of PED (e.g., substitutes, proportion of income, necessity/luxury, time period).

AO2 Analysis (3 marks max):
- Up to 2 marks: Clear explanation of how specific determinants make demand more elastic or inelastic.
- Up to 2 marks: Analysis of the link between PED and total revenue changes when price is lowered (explaining that if elastic, TR rises; if inelastic, TR falls).
(Maximum 3 marks for AO2)

AO3 Consideration / Evaluation (2 marks max):
- 1 mark: Evaluative recognition that whether a price cut increases total revenue depends directly on whether demand is elastic or inelastic (a price cut reduces TR if inelastic).
- 1 mark: A reasoned conclusion or further consideration (e.g., difficulty of calculating PED in practice, competitor reactions, or distinction between total revenue and total profit).

### Indicative Content

Knowledge, Understanding, and Analysis (AO1 & AO2 — max 8 marks):
- Definition/Context: Demerit goods are goods that are over-consumed in a free market because consumers possess imperfect information and underestimate the private costs to themselves (and often generate negative externalities).
- Mechanism of an indirect tax:
- A specific or ad valorem indirect tax is levied on producers, increasing their marginal/unit costs of production.
- This shifts the market supply curve upwards/leftwards from \(S\) to \(S + \text{tax}\).
- The equilibrium price rises from \(P_1\) to \(P_2\) and the equilibrium quantity demanded contracts along the demand curve from \(Q_1\) to \(Q_2\).
- Revenue generated by the tax can also be ring-fenced/used to fund other public services or education campaigns.
- Alternative policies:
- Information provision / public awareness campaigns: Corrects the imperfect information directly, shifting the demand curve to the left.
- Minimum price (price floor): Sets a legal price below which the good cannot be sold, directly eliminating cheap variants without generating tax revenue for the state.
- Legal regulations / bans / age restrictions: Directly limits access to the good, forcing non-consumption among target vulnerable groups (e.g. minors).

Evaluation (AO3 — max 4 marks):
- Dependence on Price Elasticity of Demand (PED): Many demerit goods (e.g. tobacco, alcohol, sugary drinks) are addictive or habitual, meaning \(|\text{PED}| < 1\). An indirect tax causes a less than proportionate contraction in quantity demanded, making taxation effective at raising government revenue but limited in curbing consumption unless the tax rate is set extremely high.
- Regressive nature & unintended consequences: High indirect taxes place a disproportionate burden on low-income consumers and may incentivize illicit markets (smuggling/counterfeit goods), which escape quality control and taxation.
- Comparison with alternatives: Information campaigns take a long time to alter consumer habits and involve high opportunity costs. Direct regulation can be costly to enforce and may lead to black markets.
- Synthesized judgment: Indirect taxation is rarely the single most effective policy when used in isolation due to inelastic demand, but is most effective when used as part of a multi-pronged strategy that combines taxation (which provides funding) with information campaigns and legal restrictions to shift consumer preferences in the long run.

Table A: AO1 Knowledge and understanding and AO2 Analysis (8 marks)

- Level 3 (6–8 marks):
- Detailed and accurate analytical explanation of how an indirect tax operates to reduce consumption (shifts in supply, price mechanism, contraction in demand).
- Detailed analysis of at least one alternative policy (e.g. negative advertising/information provision, minimum price, regulation/prohibition).
- Sound use of relevant microeconomic terminology and economic reasoning.

- Level 2 (3–5 marks):
- Explains the mechanism of an indirect tax and/or an alternative policy, but the analysis is undeveloped, one-sided, or contains conceptual inaccuracies.
- Limited or partial analytical links.

- Level 1 (1–2 marks):
- Shows basic awareness of demerit goods or taxes without structured economic analysis.
- Largely descriptive with superficial points.

- Level 0 (0 marks):
- No creditable content.

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Table B: AO3 Evaluation (4 marks)

- Level 2 (3–4 marks):
- Clear, reasoned evaluation comparing the effectiveness of indirect taxation against alternative policies.
- Explicitly considers limiting factors such as PED, regressive impacts, enforcement, time lags, or the complementary use of policy mixes.
- Forms a balanced, justified conclusion addressing 'the most effective policy'.

- Level 1 (1–2 marks):
- Generic or unsupported evaluative comments (e.g. simple assertion that taxes are good or bad).
- Unbalanced or purely one-sided conclusion.

- Level 0 (0 marks):
- No evaluative commentary.

### Knowledge and Understanding (AO1: 3 marks)
- Supply-side policies: Government measures aimed at increasing the productive potential/capacity of an economy by improving the quantity, quality, or efficiency of the factors of production (shifting the Long-Run Aggregate Supply (LRAS) curve or Production Possibility Curve (PPC) outwards).
- Productive capacity: The maximum possible output an economy can produce when all available resources are fully and efficiently employed.
- Distinction between policies:
- Interventionist policies: Direct government involvement in the market (e.g., state funding of education and vocational training, healthcare, public infrastructure projects, research and development subsidies).
- Market-based policies: Measures designed to reduce government regulations, lower barriers, and allow free-market forces to operate efficiently (e.g., deregulation, privatisation, reductions in corporation tax and income tax, labour market reforms such as lowering trade union power or reducing unemployment benefits).

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### Analysis (AO2: 3 marks)
- How interventionist policies increase productive capacity:
- Government investment in education and vocational training improves human capital and labour productivity, enabling workers to produce more output per hour.
- Capital spending on infrastructure (e.g., high-speed transport networks, digital broadband) reduces transport and logistical costs for firms, improving nationwide productive efficiency.
- These actions shift the LRAS curve to the right, expanding real potential national output ($Y_1$ to $Y_2$) without generating demand-pull inflationary pressure.
- How market-based policies increase productive capacity:
- Reductions in marginal income tax rates increase the incentive to work and enter the labour force, increasing the supply of labour.
- Cuts to corporation tax boost post-tax expected returns on investment, incentivising business capital expenditure ($I$) in new technology and physical plant.
- Deregulation reduces administrative burdens and compliance costs, encouraging competition, innovation, and dynamic efficiency, further shifting the LRAS curve to the right.

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### Evaluation / Consideration (AO3: 2 marks)
- Evaluation of relative effectiveness:
- Limitations of interventionist policies: They involve substantial opportunity costs and government borrowing, risking fiscal deficits and national debt. There are often significant time lags before returns are realised (e.g., educational reforms take years). Government failure may lead to misallocation of public funds.
- Limitations of market-based policies: Tax cuts and deregulation may widen income inequality, reduce job security, or result in environmental degradation. Moreover, tax cuts may merely stimulate short-run aggregate demand ($AD$) rather than significantly expanding productive potential if animal spirits or consumer confidence are weak.
- Reasoned Conclusion/Judgement: Neither approach alone is necessarily superior. Sustained long-term growth typically requires a complementary combination of both: interventionist policies to correct market failures in infrastructure, human capital, and education, alongside market-based policies that ensure competitive markets, flexible labour, and strong private-sector investment incentives.

Mark Allocation:
- AO1 (Knowledge and Understanding): Up to 3 marks
- 1 mark for clear definition of supply-side policies / productive capacity (LRAS / PPC).
- 1 mark for identifying and distinguishing interventionist supply-side policies.
- 1 mark for identifying and distinguishing market-based supply-side policies.

- AO2 (Analysis): Up to 3 marks
- Up to 2 marks for a well-reasoned analytical chain explaining how interventionist policies increase productive capacity/potential growth.
- Up to 2 marks for a well-reasoned analytical chain explaining how market-based policies increase productive capacity/potential growth.
(Max 3 marks for AO2 combined; candidates must cover both interventionist and market-based mechanisms to achieve full AO2 marks.)

- AO3 (Evaluation / Consideration): Up to 2 marks
- 1 mark for considering the drawbacks/limitations of one or both approaches (e.g., time lags, opportunity cost/fiscal burden of interventionist policies vs inequality/market failure of market-based policies).
- 1 mark for a reasoned conclusion or judgement on whether one approach is more effective or if a complementary mix is optimal.

### Introduction
- Definition: A current account deficit occurs when total debits (spending on imported goods, services, and net primary/secondary income outflows) exceed total credits (revenue from exported goods, services, and income inflows).
- Supply-side policies: Government measures aimed at increasing productive capacity, improving efficiency, and shifting the Long-Run Aggregate Supply (\(LRAS\)) curve outwards (e.g. education/training, infrastructure development, deregulation, R&D subsidies).

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### Analysis: How Supply-Side Policies Address a Deficit
- Mechanisms:
- Productivity & Costs: Investing in workforce training and modern infrastructure lowers unit labour costs and production expenses, allowing domestic exporters to compete more effectively on price.
- Non-price competitiveness: Support for research, innovation, and technological development enhances the quality, design, and reliability of domestic products, boosting international demand for exports (increasing credits) and encouraging domestic consumers to substitute imports with home-produced goods (reducing debits).
- Long-term sustainability: Unlike short-term demand management, supply-side improvements tackle fundamental structural deficiencies (such as low labour productivity or lack of industrial innovation) without choking off domestic economic growth.

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### Analysis: Limitations of Supply-Side Policies & Alternative Methods
- Limitations of supply-side measures:
- Time lags: Supply-side reforms (e.g. education, transport links) take many years to yield significant productivity gains, offering no immediate relief for severe balance-of-payments pressures.
- High fiscal costs & uncertainty: Substantial government spending on capital projects may worsen the fiscal deficit, with no absolute guarantee of commercial success in export markets.

- Alternative Policy Options:
- Expenditure-reducing policies (Contractionary fiscal/monetary policy):
- Higher income taxes or higher interest rates lower disposable income and aggregate demand (\(AD\)), directly reducing marginal spending on imported goods (\(M\)).
- Drawback: May trigger domestic recession, reduce investment, and increase unemployment.
- Expenditure-switching policies (Protectionism & Currency Depreciation):
- Imposing tariffs or quotas directly raises import prices, redirecting demand to domestic goods. However, this risks foreign retaliation and misallocation of resources.
- Allowing exchange rate depreciation makes exports cheaper in foreign currencies and imports dearer domestically. However, effectiveness depends on whether the sum of price elasticities of demand for exports and imports exceeds one (the Marshall-Lerner condition).

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### Evaluation & Conclusion
- The relative effectiveness of supply-side policies depends crucially on:
1. The underlying cause of the deficit: If the deficit is structural (due to uncompetitive domestic industries), supply-side policies are essential for a long-term solution. If it is cyclical (due to a short-term consumer boom), contractionary demand-side measures are faster and more appropriate.
2. Policy combinations: In practice, governments often combine policies—using short-term expenditure-reducing or expenditure-switching tools to stabilize the deficit immediately, alongside long-term supply-side policies to secure lasting competitiveness.
- Final Judgement: Supply-side policies are the most effective sustainable solution for an economy facing deep-seated structural trade imbalances, but they cannot stand alone if urgent balance-of-payments stabilisation is required.

### Level of Response Mark Scheme

#### Table A: AO1 Knowledge and Understanding & AO2 Analysis (Max 8 marks)
- Level 3 (6–8 marks):
- Clear understanding of the current account and supply-side policies.
- Detailed analysis showing the chain of reasoning of how supply-side policies affect international competitiveness (price and non-price factors) and the current account balance.
- Detailed analysis of at least one alternative policy approach (e.g. expenditure-reducing fiscal/monetary policies or expenditure-switching protectionist/exchange rate policies).
- At the top of the level, analysis is thorough, well-structured, and explicitly addresses persistent/structural deficits.
- Level 2 (3–5 marks):
- Sound explanation of supply-side policies and their impact on trade, or a one-sided analysis focusing predominantly on supply-side policies with limited comparison to alternatives.
- Chains of reasoning are present but may have minor gaps in analytical detail.
- Level 1 (1–2 marks):
- Identifies basic concepts (e.g. defines current account or lists supply-side policies) with descriptive comments and minimal economic analysis.
- Level 0 (0 marks):
- No creditable response.

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#### Table B: AO3 Evaluation (Max 4 marks)
- Level 2 (3–4 marks):
- Provides a balanced, substantiated evaluative judgement.
- Considers critical nuances such as the nature/root cause of the deficit (cyclical vs structural), time lags, fiscal costs, and the complementarity of policy packages.
- Delivers a clear, contextualised conclusion.
- Level 1 (1–2 marks):
- Generic or unsupported evaluative statements (e.g. 'supply-side policies take time whereas monetary policy is faster') without developed justification.
- Level 0 (0 marks):
- No evaluative comments presented.