2023 HSC Economics: Worked Solutions

Worked solutions to the 2023 HSC Economics examination.

Get the paper first. These solutions describe each question rather than reproducing it, so open the official paper alongside. NESA publishes it free in the 2023 Economics exam pack. The answers below are checked against the official marking guidelines. The explanations are our own.

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Section I: multiple choice

Answer key

Q	A	Q	A	Q	A	Q	A
1	B	6	C	11	C	16	B
2	B	7	A	12	D	17	C
3	C	8	D	13	D	18	C
4	A	9	C	14	A	19	B
5	B	10	A	15	A	20	D

The reasoning

1. Role of the OECD. B. To promote sustainable growth and employment for member countries. The OECD is a research and policy-coordination body for mostly advanced economies. Interest-free loans to developing economies is the World Bank's concessional arm, boosting liquidity in a crisis is the IMF, and a forum for the seven largest economies is the G7.

2. Largest export industry by value. B. Mining. Iron ore, coal and LNG alone account for a large majority of Australia's goods export earnings. Services is second and rural third. Manufacturing is a small share of exports despite being a large share of imports.

3. Participation rate falls from 65% to 60%. C. Raising the school leaving age from 16 to 18 removes 16 and 17 year olds from the labour force, shrinking the numerator. Better childcare funding and a later retirement age both raise participation, and GDP growth is associated with the encouraged-worker effect, which also raises it.

4. Cause of an AD shift to the right. A. A decrease in taxation raises disposable income and therefore consumption, shifting AD right. An increase in imports reduces AD because imports are a leakage, a decrease in consumption shifts it left, and capacity constraints affect aggregate supply.

5. Country A raises tariffs on imports from Country B. B. Consumer prices in the tariff-imposing country rise, because the tariff is passed into the domestic price. Producers in the exporting country face reduced access and lower volumes, so their income decreases. Both halves must be right.

6. Effect of signing a multilateral FTA. C. An increase in long-run real GDP, through specialisation according to comparative advantage and improved resource allocation. Tariff revenue falls, trade with non-member countries can be diverted away, and structural unemployment tends to rise in the short term as protected industries adjust.

7. Public good. A. Clean air is both non-excludable (you cannot stop anyone breathing it) and non-rival (your breathing does not reduce the amount available to me). Public housing, internet access and government buses are all excludable and rival. They are provided by government, but they are not public goods in the economic sense. That is the distinction the question is testing.

8. Contractionary change in fiscal stance. D. Stance is about the change, not the level. A surplus growing from $10m to $20m is a $10m withdrawal from the economy, so it is contractionary. Option A is a surplus shrinking, which is expansionary, B is unchanged and therefore neutral, and C is a deficit widening, which is also expansionary.

9. Rising HDI. C. Rising HDI reflects gains in income, health and education, most plausibly driven by greater access to transport and communication, the infrastructure that supports integration with the world economy. All three distractors would restrict development.

10. Decreasing an import quota. A. Note carefully that decreasing a quota means allowing fewer imports, so this is an increase in protection. The only reason listed that justifies more protection is reducing dumping. The other three options are arguments for less protection.

11. Supply of $A shifts left. C. A decrease in Australia's demand for imports means Australians need less foreign currency, so they supply fewer Australian dollars on the foreign exchange market. Supply shifts left and the AUD appreciates. Lower Australian interest rates and fewer investment opportunities would both increase the supply of AUD as capital left.

12. RBA lowers the cash rate target. D. Both increase. Lower interest rates reduce the discount rate applied to future returns, raising asset prices, and reduce the cost of borrowing, raising investment. Those are the asset-price channel and the cost-of-capital channel of the transmission mechanism.

13. Net foreign liabilities. D.

Net foreign debt   = 1200 − 300 = $900 billion
Net foreign equity = 500 − 200  = $300 billion
Net foreign liabilities = 900 + 300 = $1200 billion

Option C ($900bn) is net foreign debt alone, the single most common error on this question type. Liabilities are debt plus equity.

14. Tax to correct a negative externality of production. A. The tax increases the marginal private cost so that it aligns with the marginal social cost. Producers internalise the externality, supply contracts, and output moves towards the socially optimal level. Benefit-side options address positive externalities, not negative ones.

15. Deterioration in the terms of trade. A.

ToT = (export price index ÷ import price index) × 100

The ratio must fall, so export prices must fall relative to import prices: exports down 10%, imports up 20%. Option B has both falling by the same amount, which is no change, option D has both rising equally, also no change, and option C improves the terms of trade.

16. Maintaining a fixed exchange rate. B. The fixed rate sits below the market equilibrium, so there is excess demand for the domestic currency and upward pressure on its value. To hold the peg the central bank must sell domestic currency and buy foreign currency, adding to its reserves. Buying domestic currency would push the rate the wrong way.

17. Greatest contribution to inflation. C. Contribution is weighting multiplied by price rise, not weighting alone or price rise alone:

Education: 15 × 15 = 225
Food:      35 × 10 = 350
Health:    20 × 25 = 500   ← largest
Housing:   16 × 30 = 480

Food has the largest weight and housing the largest price rise, so both are tempting. Health wins on the product.

18. Multiplier. C.

MPS = ΔS ÷ ΔY = (270 − 250) ÷ (1100 − 1000) = 20 ÷ 100 = 0.2
k = 1 ÷ MPS = 1 ÷ 0.2 = 5
ΔY = 50 × 5 = $250 million
New national income = 1100 + 250 = $1350 million

Option A adds the injection without multiplying it.

19. Subsidy to cut imports by 50 000. B. A per-unit subsidy shifts the domestic supply curve down and to the right by the subsidy amount, so domestic producers supply more at the unchanged world price of $5 and imports fall by that increase. Reading the supply curve, the extra 50 000 units are forthcoming when producers effectively receive $15, which means a $10 subsidy on top of the $5 world price.

Note what the subsidy does not do in a small open economy. The domestic price stays at the world price, so consumers are unaffected, and the cost is borne entirely by taxpayers.

20. Decrease in the Trade Weighted Index. D. The TWI falls only if the depreciation carries more weight than the appreciation:

A: +31 (renminbi) − 9  (euro)  = net rise
B: +13 (yen)      − 7  (won)   = net rise
C: +9  (euro)     − 8  (USD)   = net rise
D: +8  (USD)      − 13 (yen)   = net FALL   ✓

Where marks were lost. Question 7 caught candidates who equate "provided by government" with "public good". Question 10 caught candidates who read "decrease a quota" as liberalisation. Question 13 caught candidates who stopped at net foreign debt.

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Section II: short answer

Question 21 (10 marks): trade and protection

(a) Outline TWO roles of the WTO (2 marks).

The WTO administers and enforces multilateral trade rules, providing the framework within which member countries progressively reduce trade barriers. It also resolves trade disputes between members through a formal dispute settlement process, which prevents unilateral retaliation and trade wars.

Two roles, one mark each. Naming one at length gets one mark.

(b) Explain why countries trade (3 marks).

Countries trade because they cannot produce everything efficiently. Resource endowments differ, so a country lacking a resource must import it. More fundamentally, the theory of comparative advantage shows that even a country able to produce everything more efficiently gains by specialising in the goods in which its opportunity cost of production is lowest and trading for the rest. Specialisation increases total world output, and trade allows each country to consume beyond its own production possibility frontier. Trade also gives access to larger markets, enabling economies of scale, and to technology and capital goods that raise domestic productivity.

The words that earn the top mark are opportunity cost. An answer built only on "countries have different resources" describes absolute advantage and sits at two marks.

(c) Explain the possible effects of a reduction in global trade protection on the global distribution of income (5 marks).

The question is about distribution, not aggregate gains. Argue both directions.

Agricultural protection in high-income economies, including the European Union's Common Agricultural Policy, United States farm subsidies and Japanese rice tariffs, excludes developing-country producers from the markets where they hold comparative advantage, while subsidised surpluses depress world prices. Removing this protection would give low-income agricultural exporters access to high-income markets, raising export income, employment and rural wages. Higher export revenue funds investment in infrastructure, health and education, raising productive capacity and accelerating convergence. On this channel, reducing protection narrows global income inequality.

The effect is not uniform. Gains flow disproportionately to economies already integrated into world markets with the infrastructure and institutions to exploit new access. The least developed economies, whether landlocked, conflict-affected, or without transport and financial infrastructure, may be unable to respond, and their existing preferential access can be eroded when general tariffs fall. Liberalisation also generates structural unemployment in import-competing industries in the short term, and its benefits within a country can be captured by capital owners instead of workers.

The likely outcome is therefore a narrowing of the gap between advanced and emerging economies alongside a widening gap between emerging and least developed economies, and greater inequality within many countries.

Five marks requires the second and third paragraphs. An answer that only says "poor countries gain" sits around three.

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Question 22 (10 marks): balance of payments and exchange rates

(a) Calculate net secondary income (1 mark).

Balance of payments must sum to zero:
CA + capital account + financial account = 0
CA = −(10 + (−70)) = 60

CA = goods (20 − 10) + net services (30) + net primary income (30) + net secondary income
60 = 10 + 30 + 30 + X
60 = 70 + X   →   X = −$10 billion

Answer: −$10 billion. The sign matters, so write it as negative, not as "10".

(b) Explain the relationship between the current account and the capital and financial account (3 marks).

Under a floating exchange rate the two sides of the balance of payments must sum to zero, because the currency adjusts until they do. Here the capital and financial account is in deficit, being a $70bn financial outflow against a $10bn capital inflow for a net outflow of $60bn, and the current account is in surplus by an offsetting $60bn. The economy is a net lender to the rest of the world: it earns more from trade and income than it spends, and the surplus is used to acquire foreign assets.

The relationship also runs through time. Financial account inflows in earlier periods create foreign liabilities that must be serviced through interest and dividend payments, which appear as net primary income debits on the current account in later periods. Today's financial inflow is tomorrow's current account outflow.

The two-part structure, being the accounting identity plus the servicing link, is what separates three marks from two.

(c) Assess the possible effects of a depreciation on the current account (6 marks).

Six marks and the verb assess, which means you must reach a judgement.

A depreciation raises the domestic-currency price of imports and lowers the foreign-currency price of exports. The immediate effect works through values before volumes. Contracts are already written, so the same physical quantity of imports costs more in domestic currency while export receipts change little. The balance on goods and services deteriorates in the short term, which is the descending arm of the J-curve.

Over the medium term volumes respond. Exports become more internationally competitive, so export volumes and values rise, while dearer imports induce substitution towards domestic production and import volumes fall. Once the sum of the price elasticities of demand for exports and imports exceeds one, satisfying the Marshall-Lerner condition, the balance on goods and services improves and the J-curve turns upward.

Net primary income moves the other way. Foreign liabilities denominated in foreign currency rise in domestic-currency terms, and the servicing cost of that debt rises with them, which is the valuation effect. For an economy carrying substantial foreign debt this partially offsets the trade improvement.

Judgement: the depreciation is likely to improve the current account over the medium to long term, because the trade response is the larger effect for most economies, but the improvement is delayed by the J-curve and eroded by higher debt servicing. Its size depends on elasticities, on the currency denomination of foreign liabilities, and on whether the depreciation is sustained rather than reversed.

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Question 23 (10 marks): distribution of income

(a) Sketch the new Lorenz curve after the Gini coefficient falls (1 mark).

Draw the new curve closer to the line of equality, above and to the left of the original, still starting at the origin and ending at the top-right corner. A lower Gini means less inequality, and the Gini is the area between the curve and the line of equality as a proportion of the area under the line. Smaller area, closer curve. Label it so the marker knows which is new.

(b) Outline ONE way government could decrease income inequality (2 marks).

Increasing transfer payments such as JobSeeker, the Age Pension and family payments raises the disposable income of low-income households, who receive a much larger share of their income from transfers than high-income households do. This lifts the bottom of the income distribution and reduces the Gini coefficient.

One way, with the mechanism. A more progressive income tax scale would do equally well.

(c) How can family structure contribute to income inequality? (2 marks).

Households differ in the number of income earners they contain. A single-parent household has at most one income and higher caring responsibilities that limit hours worked, while a dual-income couple has two. An increase in the share of single-parent and single-person households therefore widens measured household income inequality even if individual wages are unchanged. Assortative mating, where high earners partner with high earners, compounds this at the top of the distribution.

(d) Analyse the economic and social costs of increased income inequality (5 marks).

The marking guidelines split economic and social costs. Do both, or you cap at two marks.

Economic costs. Low-income households have a higher marginal propensity to consume than high-income households, so redistributing income upwards lowers aggregate consumption and therefore aggregate demand and economic growth. Inequality also constrains investment in human capital: households without the means to fund education leave talent undeveloped, which lowers long-run productivity. High-income households save a larger share of income, but where savings flow into existing assets instead of productive investment this raises asset prices without adding to capacity. Rising inequality also increases pressure on the Budget, as demand for transfer payments and public services grows while the tax base narrows.

Social costs. Inequality is associated with poorer aggregate health and education outcomes, higher crime rates, and reduced social mobility, meaning the entrenchment of disadvantage across generations. That is itself an economic cost, because it wastes productive potential. It weakens social cohesion, producing class division and political polarisation, and it can reduce the public consent on which economic reform depends.

The economic and social costs reinforce one another: lower social mobility reduces human capital formation, which lowers growth, which increases the fiscal burden of redistribution.

That final sentence is the analyse verb being answered.

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Question 24 (10 marks): labour market policies

(a) Outline ONE benefit of training and employment programs (2 marks).

Training and employment programs raise the skill level of the labour force, reducing the mismatch between the skills workers have and the skills employers demand. This reduces structural unemployment and lowers the NAIRU, allowing the economy to sustain a lower rate of unemployment without generating inflationary pressure.

Name the type of unemployment. "Helps people get jobs" is one mark.

(b) How individualised employment contracts can benefit both employers and employees (3 marks).

You must cover both parties, because the guidelines cap a one-sided answer at two.

For employees, individual contracts allow high-productivity workers to negotiate wages and conditions above the award, and to trade off pay against conditions such as flexible hours or additional leave according to their own preferences. This strengthens the incentive to acquire skills, because the returns accrue to the individual.

For employers, individual arrangements allow firms to link pay directly to individual performance, improving productivity and enabling them to attract and retain high-value staff without raising the wage bill across the whole workforce. Firms can also match staffing arrangements to the pattern of demand in their own business.

(c) Assess the effectiveness of microeconomic policies in reducing unemployment (5 marks).

Microeconomic policies raise aggregate supply by improving the efficiency of resource allocation. Competition policy, deregulation, tariff reduction and privatisation shift resources from protected, low-productivity uses towards industries where Australia holds comparative advantage, raising productivity, sustainable growth and therefore the derived demand for labour. Because they operate on the supply side, they lower the NAIRU instead of merely moving along the Phillips curve, so they reduce unemployment without the inflationary cost that expansionary demand-side policy incurs.

Australia's record supports this. Following the reform programme from the 1980s and 1990s, unemployment fell from around 11% in the early 1990s to the low 3s in 2022 and 2023. Training and employment programs and improved job-matching services directly target structural and frictional unemployment, the categories macroeconomic policy cannot reach.

The limitations are substantial. Microeconomic reform causes structural unemployment in the short term as protected industries contract, and the workers displaced are often regionally concentrated and least able to retrain, so the costs are borne by a specific group while the benefits are diffuse. The policies operate with very long implementation and impact lags, which makes them useless against a cyclical downturn. And they cannot address cyclical unemployment at all, since that is caused by deficient aggregate demand.

Judgement: microeconomic policy is highly effective against structural and frictional unemployment over the long term and is the only route to a sustainably lower NAIRU, but it is ineffective against cyclical unemployment and imposes concentrated short-term adjustment costs. It complements macroeconomic policy instead of substituting for it.

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Section III: stimulus-based extended response

Question 25: value, composition and direction of Australia's trade

The stimulus gave an RBA statement that Australia recorded its first current account surplus in 44 years in June 2019, sustained by record commodity prices, alongside a graph of export destinations showing China's share rising towards 30% while the EU, US, Japan and India stayed flat or drifted down.

Thesis. Changes to the value, composition and direction of Australia's trade have raised national income and delivered an unprecedented improvement in external stability, but they have concentrated the economy's exposure in a narrow band of commodities and a single trading partner, so the improvement is contingent on conditions that will not persist.

The paragraph plan:

1. Value. Record commodity prices lifted the terms of trade, raising export values and producing the first current account surplus in 44 years. Quote the stimulus. Higher export income raised gross national income and, through royalties and company tax, improved the Budget.
2. External stability. Persistent surpluses reduced the need to fund a deficit through foreign borrowing, slowing the accumulation of net foreign liabilities and improving the debt servicing ratio.
3. Composition. Growing reliance on resources such as iron ore, coal and LNG, and on services including tourism and education, built on comparative advantage but left export income exposed to commodity price volatility.
4. Direction. Use the graph explicitly: China's share of exports rose towards 30% while other destinations were flat. Name the concentration risk, because trade dependence is a transmission channel for a Chinese slowdown and a source of geopolitical exposure.
5. The costs. Higher export income raised demand for the AUD, appreciating the currency and reducing the competitiveness of non-resource exporters, which is a Dutch disease effect. Structural change moved resources and employment towards mining and services, and income was redistributed towards resource-owning regions and firms.
6. The sustainability question. Reliance on fossil fuel exports sits in tension with the transition to net zero, and the terms of trade gain is cyclical rather than structural.
7. Judgement. The changes improved measured economic performance substantially, but concentration in commodities and in China means the gains are volatile and the improvement in external stability may not survive a reversal in the terms of trade.

What the top band required: at least two of value, composition and direction handled properly, with the stimulus data integrated into the argument instead of quoted at the start and abandoned.

Question 26: effects of pursuing environmental sustainability

The stimulus paired a Services Australia statement on energy security and efficiency with an RBA graph of Australian coal exports under two scenarios: current policies, roughly flat near 300 million tonnes, against net zero by 2050, falling steeply towards 2050.

Thesis. Pursuing environmental sustainability imposes significant short and medium-term costs on growth, employment, inflation and the external accounts, but these are the price of intergenerational equity and of avoiding much larger long-term costs from climate damage.

The plan:

1. Define ecologically sustainable development as meeting present needs without compromising the ability of future generations to meet theirs. Intergenerational equity is the core concept.
2. External accounts. Use the graph: the net zero scenario shows coal exports falling sharply. Coal is one of Australia's largest export earners, so the transition means lower export values, a deteriorating balance on goods and services, and pressure on the current account and the AUD unless new export industries replace it.
3. Structural change and unemployment. Coal and gas regions, including the Hunter, Bowen Basin and Gladstone, face concentrated structural unemployment. Regional adjustment costs are the sharpest political constraint on the transition.
4. Inflation. Carbon pricing, environmental regulation and higher energy prices during the transition raise business costs, generating cost-push inflation and complicating monetary policy.
5. Budget. Lost coal and gas royalties and company tax on one side, transition assistance, renewable investment and regional support on the other. Both directions worsen the Budget outcome.
6. Growth and investment. Reallocating resources to renewable generation, transmission and green hydrogen is a large investment programme that raises aggregate demand in the short term and aggregate supply in the long term. Australia's resource endowment in solar, wind and critical minerals is a genuine comparative advantage in a decarbonising world.
7. The counterfactual. Not acting is not costless: more frequent droughts, bushfires and floods reduce agricultural output, damage infrastructure, raise insurance costs and impose recurring Budget costs.
8. Judgement. The costs of the transition are real, concentrated and near-term while the benefits are diffuse and long-term, which is precisely why market forces alone will not deliver it and why the policy question is one of managing the distribution of adjustment costs.

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Section IV: extended response

Question 27: evaluate the impact of globalisation on growth and development in an economy other than Australia

Evaluate requires a judgement supported by criteria. Name the economy in your first sentence and use its data throughout.

Thesis, using China. Globalisation has been the decisive driver of Chinese economic growth and development since 1978, delivering the fastest sustained poverty reduction in history, but its benefits have been distributed unevenly across regions and households and have imposed serious environmental costs. The rate of development it enabled and the quality of that development must therefore be judged separately.

The plan:

1. Define globalisation, economic growth as an increase in real GDP, and economic development as a broader concept including health, education and living standards, measured by HDI.
2. Trade integration. The Open Door policy from 1978, Special Economic Zones, and WTO accession in 2001. Export-oriented manufacturing built on comparative advantage in abundant low-cost labour, with growth averaging near 10% a year for three decades.
3. Foreign investment and TNCs. FDI brought capital, technology and management practice. Technology transfer and the movement of workers from low-productivity agriculture into higher-productivity manufacturing were the two engines of productivity growth.
4. Development outcomes. Roughly 500 million lifted out of extreme poverty, HDI risen to about 0.815 and into the very high human development band, and large gains in life expectancy and schooling.
5. The costs. Regional inequality between coastal and interior provinces, the hukou system restricting migrants' access to urban services, and a Gini coefficient around 0.47, high by developed-economy standards. Severe air, water and soil pollution. Exposure to the international business cycle, demonstrated in the 2008 global financial crisis when export demand collapsed and China responded with a large fiscal stimulus.
6. Policy response. The rebalancing towards domestic consumption, the Belt and Road Initiative, and poverty-alleviation and environmental programmes, all evidence that the costs were recognised and addressed.
7. Evaluation. Judge against criteria: on growth, unambiguously effective; on aggregate development, highly effective; on distribution and environmental sustainability, much weaker. The controlled, staged nature of Chinese liberalisation, gradual and with capital controls retained, is itself part of the explanation, and it distinguishes China's outcome from economies that liberalised rapidly.

Question 28: evaluate Australia's macroeconomic policies in achieving growth and price stability

Two objectives named, so structure the response around both and around the conflict between them.

Thesis. Australia's macroeconomic policies have been highly effective at achieving price stability and reasonably effective at sustaining growth, but the two objectives conflict in the short run, and the policy mix since 2020 has revealed the limits of both instruments.

The plan:

1. Define economic growth and price stability, and identify the two macroeconomic instruments: monetary policy through the RBA and the cash rate, and fiscal policy through the Budget.
2. Monetary policy and price stability. Flexible inflation targeting since 1993, at 2 to 3% on average over the cycle, with inflation averaging close to the target band for nearly three decades. Explain the transmission mechanism: cash rate to market interest rates to consumption, investment, asset prices, the exchange rate and cash flow.
3. Monetary policy and growth. Counter-cyclical rate settings, the sustained easing after the global financial crisis, and the emergency response in 2020 with a 0.10% cash rate, the term funding facility, yield curve control and bond purchases.
4. Fiscal policy. Automatic stabilisers, the discretionary stimulus of 2008 and 2009, and the far larger 2020 response through JobKeeper and cash flow support. Fiscal policy is the more powerful instrument at the effective lower bound on interest rates, because monetary policy loses traction there.
5. The conflict. The post-pandemic inflation episode is the clearest recent case: inflation peaked above 7% in late 2022, and the RBA raised the cash rate from 0.10% to 4.10% across 2022 and 2023. Disinflation required deliberately slowing growth. Use the short-run Phillips curve to show the trade-off and the long-run vertical curve to show it is temporary.
6. Limitations. Time lags of recognition, implementation and impact, roughly 6 to 18 months for monetary policy. Political constraints on fiscal policy and the difficulty of withdrawing stimulus. Monetary policy is a blunt instrument with uneven distributional effects, falling hardest on mortgaged households. Neither instrument can address supply-side inflation from energy prices or supply-chain disruption.
7. Evaluation. Highly effective on price stability judged over the full period, because inflation returned to target after each shock. Reasonably effective on growth, given nearly three decades without a technical recession before 2020. But the objectives conflict in the short run, and sustainable growth alongside stable prices ultimately requires microeconomic reform to raise productive capacity, which is the limitation the demand-management instruments cannot overcome.

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What to do with this paper

Do it timed and closed-book first. Mark it against NESA's published guidelines before reading any of the above, then classify every lost mark as knowledge, verb, data, timing or diagram.

Question 22(a) is worth a specific drill: calculate the missing balance of payments component in every paper from 2015 onwards. It appears almost every year, it is worth a guaranteed mark, and it is lost purely on sign errors.

Related: 2025 worked solutions · 2024 worked solutions · Every formula you need

Questions are described rather than reproduced. The 2023 examination paper and marking guidelines are © NSW Education Standards Authority and are available free from the NESA website. Answers verified against the official marking guidelines; explanations are our own.