2020 HSC Economics: Worked Solutions

Worked solutions to the 2020 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 2020 Economics exam pack. The answers below are checked against the official marking guidelines. The explanations are our own.

One structural note before you start. 2020 used an uneven mark split in Section II: Question 21 was worth 11 marks, Questions 22 and 23 were worth 9 each, and Question 24 was worth 11. Check the mark allocation on every part instead of assuming the usual 2, 3 and 5 pattern.

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Section I: multiple choice

Answer key

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

Question 7 has two accepted answers. NESA credited both B and C. The explanation is below.

The reasoning

1. Two economic objectives of monetary policy. A. Price stability and full employment. These are two of the three objectives in the Reserve Bank Act 1959, the third being the economic prosperity and welfare of the Australian people. Monetary policy influences growth and the exchange rate, but they are not its stated objectives, and distribution is not a monetary policy objective at all, which is worth remembering because it is the basis of the strongest criticism of expansionary monetary policy.

2. Financial stability in global financial markets. C. The IMF. Distinguish them once and for all: IMF for short-term stability and crisis lending, World Bank for long-term development finance, WTO for trade rules, APEC as a regional economic forum.

3. Feature of decentralised wage determination. D. Employment contracts can vary from one workplace to another. That variation is decentralisation. Government determining wage outcomes and wages indexed to inflation are features of a centralised system, and decentralisation tends to increase income inequality rather than reduce it.

4. Characteristic of a developing economy. C. Inadequate access to education and underprovision of public goods. Check each distractor against a real developing economy: population growth is typically high, infant mortality is high, and GDP is dominated by agriculture and primary industry rather than services. Only C survives.

5. Reducing an import quota. A. Read the direction carefully, because reducing a quota means allowing fewer imports, which is an increase in protection. Domestic supply is restricted, so prices rise. Foreign exporters lose revenue, domestic producers gain income, and a quota generates no government revenue in the first place, since the rent goes to whoever holds the import licence, so option D fails on its own terms.

6. Terms of trade. B.

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

Year 1: 100 ÷ 125 × 100 = 80
Year 2:  80 ÷ 160 × 100 = 50     →  DECREASED

The 200 options invert the formula, putting import prices over export prices. Get the ratio the right way up, with exports on top, because the terms of trade measure what you can buy with what you sell.

7. A foreign business buys the rights to sell an Australian-designed product overseas. B and C. The intended answer is a credit in the capital account. The capital account records the purchase and sale of non-produced, non-financial assets: patents, copyrights, trademarks, licences and franchises. Selling those rights brings money into Australia, so it is a credit.

NESA also accepted C, a debit in the financial account, because the transaction can be read as Australia disposing of an asset. Note the lesson rather than the loophole: intellectual property rights belong in the capital account, which is the part of the balance of payments students most often forget exists.

8. Causes a decrease in the participation rate. C. An increase in hidden unemployment means more discouraged workers, meaning people who have given up searching. They leave the labour force by definition, shrinking the numerator of the participation rate. Fewer discouraged workers has the opposite effect, and a falling unemployment rate typically raises participation through the encouraged worker effect.

9. Cause of the AD shift. C. The diagram showed aggregate demand shifting left, so look for a contractionary change: an increase in the cash rate reduces consumption and investment. A higher tax-free threshold raises disposable income and shifts AD right, higher employment in a trading partner raises export demand and also shifts AD right, and business investment in training affects aggregate supply.

10. Accounting for the changes in CPI and unemployment. D.

Inflation = (103 − 100) ÷ 100 = 3%

Unemployment rate = unemployed ÷ labour force
  Year 1: 200 ÷ (1800 + 200) = 200 ÷ 2000 = 10.0%
  Year 2: 125 ÷ (2000 + 125) = 125 ÷ 2125 =  5.9%

Prices rose and unemployment fell sharply. Increased consumer confidence raises aggregate demand, which generates demand-pull inflation and explains the CPI. An appreciation in a major trading partner's currency makes Australian exports cheaper for that partner, raising export demand and employment, which explains the unemployment fall. Both halves work, which no other row manages.

11. Stance and effect of a depreciation. B. A depreciation caused by monetary policy means the cash rate was cut, which is an expansionary stance. The effect: a depreciation raises the domestic-currency cost of international borrowing, because foreign-currency debt and its servicing cost more in domestic dollars. Option A fails because a depreciation makes outward FDI more expensive, not less.

12. Growth rises while unemployment stays at the NAIRU. C. The best question in the paper. Real growth rose from 2.1% to 2.9% but unemployment held at 5.2%, and you are told the economy is at the NAIRU, so unemployment cannot fall further without accelerating inflation.

Where does the extra output come from? Higher aggregate demand accompanied by a decrease in underemployment. Firms meet extra demand by giving existing part-time workers more hours instead of hiring new workers. Underemployment falls while the unemployment rate is unchanged, which is precisely why the unemployment rate alone is an inadequate measure of labour market slack.

Option D fails because structural unemployment is a supply-side phenomenon that higher aggregate demand cannot reduce.

13. Decline in net foreign liabilities as a share of GDP. D. Returns on international investments by domestic businesses. Higher returns on Australian-owned foreign assets increase the value of assets held abroad, which reduces net foreign liabilities, being foreign assets owned by us netted against our assets owned by foreigners. More foreign investment into the economy increases liabilities, and rising debt servicing costs worsen the position.

14. Capital and financial account in Year 2. B.

Under a float:  CA + capital and financial account = 0

Year 2: CA = +3.5 surplus  →  KFA = −3.5   (a DEFICIT)
Year 1: KFA = +10.6 surplus

Change in size = 10.6 − (−3.5) = 14.1

The trap is subtracting 3.5 from 10.6 and getting 7.1. The accounts moved from a surplus to a deficit, so the movement spans zero and you add the magnitudes.

15. Headline below underlying inflation. B. Underlying inflation strips out the most volatile price movements. If headline at 2.3% sits below underlying at 2.6%, a volatile item must be pulling the headline figure down, and a short-term oversupply of petrol is exactly that. A drought reducing fruit supply would push headline above underlying, which is the more familiar direction and the trap here.

16. What is true for this economy. D.

Nominal GDP: 400 → 420   =  +5%
CPI:         100 → 105   =  +5%
Real GDP = 420 ÷ 105 × 100 = 400   →  UNCHANGED

Real GDP is unchanged, so the answer must contain that, which eliminates B and C. Between A and D, the explanation must account for a 5% rise in prices with no rise in output, and increasing costs of production is cost-push inflation, exactly that combination. A fall in global activity would not raise prices.

17. Marginal propensity to consume. C.

k = ΔY ÷ ΔG = 25 ÷ 10 = 2.5
k = 1 ÷ (1 − MPC)   →   2.5 = 1 ÷ (1 − MPC)
1 − MPC = 0.4   →   MPC = 0.6

Option B (0.4) is the MPS.

18. Domestic production and government revenue. A.

Before trade:  domestic production = domestic consumption = 30 000 kg

After the tariff:
  total consumption = 35 000 kg
  imports           = 10 000 kg
  domestic production = 35 000 − 10 000 = 25 000 kg

Change in domestic production = 25 000 − 30 000 = DOWN 5 000 kg
Tariff revenue = $5 × 10 000 = $50 000 increase

Two traps. Domestic production falls by 5 000, not by the 10 000 kg of imports, because total consumption rose by 5 000 as the price fell. And tariff revenue is charged on imports only, meaning 10 000 kg, not on total consumption, which would give the $175 000 that nobody offered but many candidates half-calculated on the way to picking $200 000.

19. Accounting for the exchange rate movement. C. Read the table carefully, because the direction is the whole question.

Year 1: AUD 1.0 = USD 0.9    →  1 AUD buys 0.90 USD
Year 2: AUD 0.9 = USD 1.0    →  1 AUD buys 1.11 USD

The AUD appreciated, or equivalently the USD depreciated, which eliminates A and B immediately. The cause: an increase in Australia's cash rate relative to the US cash rate widens the interest rate differential, attracting capital into Australia and raising demand for the AUD.

20. Minimum wage above equilibrium, effect on the Lorenz curve. D. A minimum wage set above the market-clearing wage creates an excess supply of labour, meaning unemployment. Workers who lose their jobs move from wage income to much lower transfer income, so the income distribution becomes less equal and the Lorenz curve shifts outwards, away from the line of equality.

The error in options A and C is "all employees receive a higher wage", because they do not: some are no longer employed. Option B contradicts the diagram, since a binding minimum wage reduces the quantity of labour demanded.

Where marks were lost. Question 12 was the discriminator, because it required knowing that at the NAIRU further demand shows up in hours instead of headcount. Question 14 caught candidates who subtracted instead of adding across zero. Question 18 caught candidates who assumed domestic production falls by the volume of imports.

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Section II: short answer

Question 21 (11 marks): development and the global economy

(a) With reference to the data, outline ONE reason for the change in income distribution (2 marks).

The Gini coefficient fell from 0.87 to 0.74, a large fall from extreme inequality towards merely high inequality, while HDI barely moved from 0.35 to 0.36.

The Gini coefficient fell from 0.87 to 0.74, indicating a significant reduction in income inequality. A likely cause is a change in taxation and transfer policy, such as a more progressive income tax scale or increased transfer payments targeted at low-income households. Both raise the disposable income share of the bottom of the distribution relative to the top, moving the Lorenz curve towards the line of equality.

"With reference to the given data" means quote the numbers. An answer that does not cite 0.87 and 0.74 loses a mark regardless of how good the economics is.

(b) Outline ONE disadvantage to a developing economy of an FTA with advanced economies (2 marks).

The developing economy's infant industries are exposed to competition from established firms in advanced economies that already enjoy economies of scale and superior technology. Unable to compete on price, domestic producers lose market share, production and employment contract, and the industry may never reach the scale at which it could have become internationally competitive. The result is structural unemployment and continued dependence on imports in that sector.

Alternatives that also earn full marks: exposure to dumping, or the weaker bargaining power of a developing economy negotiating bilaterally with a much larger partner, which tends to produce agreements favouring the larger economy.

(c) Describe ONE way the World Bank promotes development (3 marks).

The World Bank provides long-term concessional finance and technical assistance for infrastructure. It lends at below-market interest rates, with long repayment periods, for projects that developing economies cannot fund domestically because their savings pools are too small and private capital markets regard them as too risky: roads, ports, power generation, water, schools and health facilities.

The mechanism matters. Infrastructure raises aggregate supply, because transport links reduce the cost of moving goods to market and enable producers to reach export markets, reliable electricity allows firms to operate and expand, and schools and health facilities build the human capital that raises labour productivity. The result is higher productive capacity, employment and incomes, meaning economic growth that translates into development because it targets health and education directly.

Three marks needs the mechanism, not just the fact of lending.

(d) Explain TWO factors that could prevent growth from improving development (4 marks).

Two marks each, so develop two factors properly rather than listing five.

Inequitable distribution of income. Economic growth raises aggregate income, but development depends on whether that income reaches the population. Where growth is concentrated in an enclave sector, typically mining or oil, capital-intensive and often foreign-owned, the income accrues to capital owners and a small skilled workforce instead of the wider population. Measured GDP per capita rises while access to health care, education and clean water is unchanged, so HDI stagnates. This explains why an economy can post strong growth alongside a very high Gini coefficient and a low HDI, as the stimulus data in part (a) shows.

Corruption and weak institutions. Where governance is weak, the government revenue generated by growth is diverted to private interests instead of funding health, education and infrastructure. Corruption also deters investment by raising the risk and cost of doing business. A related mechanism operates through transnational corporations: profits are repatriated to the home economy instead of reinvested, transfer pricing and tax minimisation reduce the host government's tax base, and skilled roles may be filled by expatriate staff, so the value added is recorded in the host economy's GDP without generating the revenue or the skills that development requires.

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Question 22 (9 marks): unemployment

(a) Distinguish between structural and cyclical unemployment (2 marks).

Structural unemployment results from a mismatch between the skills, or the location, of unemployed workers and those demanded by employers, typically caused by technological change or structural change in the economy. It persists regardless of the state of the business cycle and requires supply-side policy to address.

Cyclical unemployment results from deficient aggregate demand during a downturn in the business cycle. It is temporary, and it responds to expansionary macroeconomic policy.

The key difference is the cause and therefore the remedy. Cyclical unemployment is a demand problem solved by demand-side policy, while structural unemployment is a supply problem solved by education, training and mobility policy.

(b) Describe how ONE government policy has addressed a skills shortage (3 marks).

Name a specific policy.

The Commonwealth introduced the Temporary Skill Shortage visa in 2018, replacing the 457 visa. It allows employers to sponsor skilled migrants for occupations on a defined skills shortage list where they can demonstrate that no suitable Australian worker is available. This addresses the shortage immediately by importing the skills instead of waiting years for domestic training to produce them.

Employers sponsoring a worker must pay a levy into the Skilling Australians Fund, which finances apprenticeships and traineeships. The design therefore tackles the shortage twice, filling vacancies now while funding the domestic training that reduces reliance on skilled migration in the medium term. Filling shortage vacancies reduces production bottlenecks, raises productive capacity, and relieves the upward wage pressure that skills shortages generate in the affected occupations.

(c) Explain how a decrease in aggregate demand leads to underemployment (4 marks).

Note carefully that this asks about underemployment, not unemployment. Underemployed workers are employed but want and are available for more hours.

A decrease in aggregate demand reduces consumption and therefore the sales firms expect. Since the demand for labour is a derived demand, derived from the demand for the goods labour produces, firms need less labour input.

Firms have two ways to reduce labour input: shed workers, or cut hours. Reducing hours is frequently preferred because retrenchment is costly. Redundancy payments must be made immediately, the firm-specific skills and training embodied in the worker are lost, and re-hiring and re-training when demand recovers is expensive. Cutting hours preserves the employment relationship and gives the firm the flexibility to restore hours quickly when conditions improve. This is more feasible where the workforce is casualised or part-time, as much of Australia's retail and hospitality workforce is.

The result is that workers remain employed, counted as employed in the labour force statistics even if they worked only one hour in the reference week, but work fewer hours than they want. Underemployment rises while measured unemployment rises by less, or not at all.

This is why the underutilisation rate, which combines unemployment and underemployment, is a better measure of labour market slack than the unemployment rate alone. The 2020 pandemic demonstrated it directly: underemployment rose sharply as hours were cut across the economy, and JobKeeper was explicitly designed to keep workers attached to employers instead of allowing the adjustment to occur through retrenchment.

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Question 23 (9 marks): protection

(a) Outline ONE reason for the protection of domestic industries (2 marks).

The infant industry argument. A newly established domestic industry cannot initially compete with established foreign producers that already enjoy economies of scale, accumulated experience and lower unit costs. Temporary protection allows the domestic industry to grow to efficient scale and develop its capabilities, after which protection can be removed and the industry competes unassisted. The justification depends on the protection being temporary, and the practical difficulty is that protected industries acquire a political constituency and the protection rarely ends.

Other acceptable reasons: protecting domestic employment, defending against dumping, national defence self-sufficiency, and improving the balance of payments.

(b) Draw the effect of a subsidy with imports equal to zero (1 mark).

Draw a new supply curve to the right of, and below, the original, shifted vertically down by the amount of the subsidy, positioned so that it intersects the demand curve at the world price line, because the subsidy is exactly large enough to eliminate imports.

The economics behind the sketch is worth understanding even though the mark is for the drawing. The subsidy lowers producers' effective marginal cost, so they supply more at every price. When domestic supply expands to meet domestic demand entirely at the world price, imports are zero. Note what the subsidy does not do: the domestic price stays at the world price, so consumers pay no more than before, and the entire cost is borne by taxpayers. That is the crucial difference from a tariff, which raises the price consumers pay.

(c) Discuss Australia's involvement in ONE bilateral trade agreement (6 marks).

Discuss means both sides, and the agreement must be named.

Agreement: the China and Australia Free Trade Agreement, in force since December 2015.

The case for. ChAFTA progressively eliminated tariffs on the large majority of Australian goods exports to China, Australia's largest trading partner. Agricultural exporters were the primary beneficiaries, with tariffs on beef, dairy, wine, horticulture and seafood phased out, in several cases from rates above 20%. This improved price competitiveness in a market of enormous scale, raising export volumes and values, supporting employment in regional agricultural communities, and improving the balance on goods and services. Services provisions expanded access for Australian financial services, legal services, education and health providers, and the agreement facilitated Chinese investment in Australian infrastructure and agriculture, adding to the domestic capital stock.

The case against. The investment facilitation arrangements permit Chinese firms undertaking large projects to bring in workers from China under labour agreements, which unions argued would reduce employment opportunities for Australian workers and undercut local wages and conditions. Investor-state dispute settlement provisions allow foreign investors to sue the Australian government over regulatory changes affecting their investments, which constrains domestic policy sovereignty, including in areas such as environmental and health regulation.

More fundamentally, the agreement deepened Australia's trade concentration in a single partner. When the relationship deteriorated from 2020, China imposed restrictions on Australian barley, wine, coal, timber, lobster and beef, demonstrating that the concentration created by the agreement was itself a strategic vulnerability, and that a bilateral agreement offers little protection when a partner chooses to use trade as a political instrument. The exporters most exposed were precisely the agricultural industries the agreement was designed to benefit.

Judgement. ChAFTA delivered substantial and measurable gains to Australian exporters over its first five years, but by accelerating concentration in one market it increased Australia's exposure to a risk that subsequently materialised. Bilateral agreements deliver deeper concessions than multilateral ones precisely because they involve fewer parties, and that same feature makes the resulting trade relationship more fragile.

Six marks is a substantial answer. Budget around ten minutes and write four or five developed paragraphs, not a list.

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Question 24 (11 marks): microeconomic reform

(a) Describe the relationship between microeconomic reform and aggregate supply (3 marks).

Microeconomic reform improves the efficiency with which resources are allocated and used, enabling the economy to produce more output at each price level. That is a rightward shift of the aggregate supply curve and an increase in the economy's productive capacity.

The mechanism runs through the three efficiencies. Allocative efficiency improves as resources move from protected, low-productivity uses to industries where the economy has a comparative advantage. Technical efficiency improves as competitive pressure forces firms to minimise costs at each level of output. Dynamic efficiency improves as firms exposed to competition innovate and adopt new technology in order to survive.

The macroeconomic consequence is significant. Because aggregate supply has increased, the economy can sustain a higher level of output without generating inflationary pressure. Microeconomic reform therefore raises the rate of growth that is sustainable, which demand-side policy cannot do.

(b) With reference to a specific product market, explain how ONE microeconomic reform led to increased efficiencies (4 marks).

Name the market, because the answer space requires it.

Product market: telecommunications.

Australian telecommunications was a statutory monopoly under Telecom until reform beginning in 1991. Deregulation removed the barriers to entry, admitting competitors including Optus and later Vodafone and a large number of resellers, and Telstra was progressively privatised from 1997.

Allocative efficiency improved because prices, no longer set administratively by a monopolist, came to reflect the cost of provision, and resources were directed towards the services consumers actually valued, most visibly mobile and data services instead of fixed-line voice. Technical efficiency improved because firms facing competitors could no longer pass inefficiency through to captive customers, so they were forced to reduce costs at each level of output. Dynamic efficiency improved most of all, because competing firms invested heavily in successive generations of mobile network technology and in fibre in order to differentiate their offering.

The outcomes are measurable. Real prices for telecommunications services fell substantially over the period, the range of services expanded enormously, and mobile and broadband penetration rose to near-universal levels. Public investment in the National Broadband Network from 2009 addressed the remaining problem, which is that a purely commercial market under-invests in regional and remote infrastructure where the return does not justify the cost.

The wider economic effect is a positive externality: faster, cheaper communications lower input costs and enable productivity gains across every other industry, not only in telecommunications itself.

(c) Explain how labour market microeconomic reform can lower cost inflation (4 marks).

Cost inflation arises when rising production costs are passed into prices. Since wages are the largest single component of production costs across the economy, the key variable is unit labour cost, meaning the labour cost of producing one unit of output, which depends on wages relative to productivity.

Unit labour cost = wages ÷ productivity

Enterprise bargaining, introduced from 1991, is the central reform. Because wages are negotiated at the level of the individual workplace, wage increases can be tied directly to productivity improvements achieved at that workplace, including changes to work practices, staffing arrangements, and the adoption of new technology. Where wage growth is matched by productivity growth, unit labour costs are unchanged and no cost-push pressure is generated, even though workers receive real wage increases. This is what breaks the link between wage growth and inflation that a centralised system, with flow-on wage claims across unrelated industries, tended to create.

Education, training and skilled migration reduce skills shortages. A shortage of a particular skill bids up wages in that occupation without any corresponding productivity gain, raising unit labour costs. Increasing the supply of skilled labour relieves that pressure and, by reducing structural unemployment, lowers the NAIRU, meaning the economy can operate at lower unemployment before wage pressure emerges.

Increased labour mobility, through the removal of restrictive work practices and the recognition of qualifications across jurisdictions, allows workers to move to where they are most productive, again raising output per worker and lowering unit labour costs.

The empirical record supports this. Real unit labour costs in Australia trended downwards across most of the period following the reforms, and inflation remained within the 2 to 3% target band for close to three decades.

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Section III: stimulus-based extended response

Question 25: exchange rate fluctuations and external stability

The stimulus was a comment on the fall in the value of the Australian dollar, describing it as taking the currency "down to levels that counteract Australia's relatively high cost levels" and as "very positive" for internationally competing sectors including manufacturing, tourism, higher education, agriculture and mining, alongside an ABS diagram.

Thesis. Exchange rate fluctuations affect external stability in opposing directions. A depreciation improves international competitiveness and the trade balance, but simultaneously increases the AUD value of foreign liabilities and their servicing cost. The float is nonetheless a stabilising mechanism overall, because it delivers automatic adjustment that a fixed rate would require policy to achieve.

The plan:

1. Define external stability and name its measures: the current account as a share of GDP, net foreign debt and net foreign liabilities as a share of GDP, the debt servicing ratio, and the terms of trade. Define the exchange rate and the TWI.
2. Depreciation and the trade balance, the positive case. Use the stimulus explicitly. A lower AUD offsets Australia's high domestic cost levels, restoring international competitiveness. Name the sectors the stimulus names. Export volumes rise, import volumes fall, and the balance on goods and services improves.
3. The J-curve. The improvement is not immediate. Contracts are already written, so import values rise before volumes adjust and the trade balance initially deteriorates. Improvement follows once the Marshall-Lerner condition is satisfied.
4. Depreciation and net foreign liabilities, the negative case. The valuation effect: foreign-currency-denominated debt rises in AUD terms, increasing net foreign liabilities and the debt servicing ratio without any new borrowing. This worsens external stability on the liabilities measure at the same time as it improves it on the trade measure. Note the mitigating factor, which is that a large share of Australia's foreign liabilities is either AUD-denominated or hedged, substantially limiting this effect.
5. Appreciation. The reverse: competitiveness falls and the trade balance deteriorates, but foreign liabilities fall in AUD terms. Sustained appreciation during a commodity boom also produces Dutch disease, hollowing out non-resource tradeable industries, which is a structural cost that outlasts the boom.
6. The float as an automatic stabiliser. This is the strongest analytical point available. When the terms of trade fall, export income falls, demand for the AUD falls, and the currency depreciates, automatically restoring competitiveness and cushioning the shock. Under the fixed rate that operated before 1983, the same adjustment required a discrete devaluation decision, foreign reserves and, often, a domestic recession. The float also insulates domestic monetary policy, allowing the RBA to set the cash rate for domestic conditions instead of defending a peg.
7. Volatility as the cost. Sharp fluctuations create uncertainty for exporters and importers, complicate long-term investment decisions, and impose hedging costs.
8. Assessment. Exchange rate fluctuations have a mixed effect on external stability measure by measure, but the flexibility of the float is a net positive because it delivers continuous automatic adjustment. The deeper point is that the exchange rate is a symptom as much as a cause, because it moves in response to the terms of trade and interest rate differentials, so treating it as an independent influence on external stability inverts the causation.

Question 26: economic policies and international agreements in environmental management

The stimulus paired a UN Climate Action Summit statement, noting global emissions at record levels with "no sign of peaking", a call for a 45% reduction over the next decade, and "widespread concern that the world is presently way off course", with a bar graph of Australian primary energy consumption showing continued dominance of fossil fuels.

Thesis. Australia's environmental policies and international agreements have produced measurable improvements in specific areas, but they have been insufficient against the scale the UN identifies. The central reason is structural rather than technical: environmental policy imposes concentrated domestic costs to deliver diffuse global benefits.

The plan:

1. Define ecologically sustainable development and intergenerational equity, and identify the market failures involved: negative externalities, the free rider problem, common access resources, and the fact that greenhouse gases are a global externality.
2. Market-based policies. The Renewable Energy Target, which drove substantial growth in renewable generation capacity, the carbon pricing mechanism of 2012 to 2014, which produced measurable emissions reductions in the electricity sector, and the Emissions Reduction Fund. Assess: market-based instruments are theoretically the most efficient, because abatement occurs wherever it is cheapest, but Australian carbon pricing lasted two years.
3. Regulations and targets. Vehicle emissions standards, building efficiency requirements, land clearing restrictions, water allocation under the Murray-Darling Basin Plan, and container deposit schemes. Assess: regulations achieve certainty of outcome but are less efficient, because they impose the same requirement on firms with very different abatement costs.
4. International agreements. Kyoto, ratified 2007, Paris in 2015, and Australia's nationally determined contributions. Assess: agreements coordinate action and create reputational pressure, but they are not legally enforceable, targets are self-nominated, and withdrawal is possible, as the United States demonstrated by leaving the Paris Agreement in 2017. Use the stimulus, because the world is "way off course" despite the agreements existing, which is the strongest available evidence on their effectiveness.
5. Use the energy consumption graph. Fossil fuels continue to dominate Australia's primary energy consumption, which is the most direct evidence that policy has not achieved structural change at the scale required. A 45% reduction within a decade cannot be reconciled with that energy mix.
6. Why policy has been insufficient. Political constraints and the electoral cycle. The repeal of carbon pricing and the Minerals Resource Rent Tax. Policy uncertainty deterring the long-horizon energy investment required. The free rider problem, since Australia produces slightly over 1% of global emissions and bears full domestic cost for a shared global benefit. Conflicts with growth, employment and external stability, since coal and gas are major export earners. And long time lags against a problem where some damage is irreversible.
7. What has worked. Be balanced, because the assessment is not that nothing worked. Ozone-depleting substances were successfully phased out under the Montreal Protocol, an unusually effective agreement because substitutes were available and the number of producers was small. Renewable generation has grown substantially, and Australia has among the world's highest rates of household solar installation. Water trading in the Murray-Darling has improved allocative efficiency.
8. Assessment. Policies have been partially effective where the externality is local, the cost is contained and substitutes exist, and largely ineffective where the externality is global and the abatement cost falls on major export industries. The determinant is not the choice of instrument but whether the political economy of the problem allows the instrument to survive.

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Section IV: extended response

Question 27: macroeconomic policies, economic growth and full employment

Thesis. Australia's macroeconomic policies have been highly effective in stabilising the business cycle and eliminating cyclical unemployment, but they cannot raise the sustainable rate of growth or reduce unemployment below the NAIRU, so their effectiveness has a ceiling set by the economy's productive capacity.

The plan:

1. Define economic growth and full employment. Establish that full employment means the NAIRU, meaning the elimination of cyclical unemployment rather than zero unemployment. This definition is load-bearing for the entire essay.
2. Monetary policy. The RBA, the cash rate, and flexible inflation targeting since 1993. The transmission mechanism: cash rate to market interest rates to consumption, investment, cash flow, asset prices and the exchange rate, then to aggregate demand, output and derived demand for labour.
3. Monetary policy, the evidence. Rate cuts through 2008 and 2009 and again through 2019 and 2020 supported growth. Australia recorded close to three decades without a technical recession before 2020.
4. Fiscal policy. The Budget, the automatic stabilisers, and discretionary stimulus. The 2008 and 2009 response of roughly $52 billion and the far larger 2020 response through JobKeeper and cash flow support. Note that fiscal policy becomes the primary instrument at the effective lower bound, where monetary policy loses traction.
5. The conflict between the objectives. Expansionary policy that pushes unemployment below the NAIRU generates accelerating inflation. Use the short-run Phillips curve to show the trade-off and the vertical long-run curve to show it is temporary, because expectations adjust and the economy returns to the NAIRU at a higher rate of inflation.
6. Limitations. Time lags of recognition, implementation and impact, roughly 6 to 18 months for monetary policy and constrained by the annual Budget cycle for fiscal policy. Political constraints on withdrawing fiscal stimulus. The blunt, undifferentiated nature of monetary policy and its uneven distributional effects. The effective lower bound. Global factors beyond domestic control. And the decisive one: neither instrument can reduce structural unemployment, because that requires supply-side policy.
7. Assessment. Highly effective at managing the cycle, ineffective at raising capacity. Sustainable growth and a lower NAIRU require microeconomic reform, so macroeconomic policy is necessary but not sufficient for either objective named in the question.

Question 28: limitations of economic policies, growth and income distribution

The verb phrase is "to what extent", which requires a judgement of degree. Argue that limitations matter a great deal, somewhat, or only at the margin, rather than listing limitations.

Thesis. Limitations affect the two objectives asymmetrically. Growth is constrained mainly by technical limitations, meaning time lags and global factors, which can be mitigated by better policy design. A more equal income distribution is constrained mainly by political limitations and by conflicts with other objectives, which cannot. Limitations therefore bear far more heavily on distribution than on growth.

The plan:

1. Define economic growth and distribution of income, and identify the measures: real GDP growth, and the Gini coefficient, quintile shares and the Lorenz curve.
2. Time lags. Recognition, implementation and impact lags mean policy can arrive after the problem has passed and prove pro-cyclical. Fiscal policy is tied to the annual Budget cycle, and monetary policy operates with a 6 to 18 month impact lag. This constrains growth management significantly, but note the counter-evidence: the 2020 response was delivered within weeks, so the lag is a constraint of normal politics rather than an inherent one.
3. Global influences. A small open economy cannot control the international business cycle, commodity prices, global interest rates or financial contagion. The 2008 crisis and the 2020 pandemic both originated externally. This is a severe limitation on growth and one policy cannot remove, only cushion.
4. Political constraints. The electoral cycle discourages measures with short-term costs and long-term benefits. Redistribution creates identifiable losers who organise, while the beneficiaries are diffuse and do not. Tax reform proposals that would improve progressivity, including changes to capital gains tax discounts, negative gearing and superannuation tax concessions, have repeatedly failed. This limitation bears overwhelmingly on distribution.
5. Conflicts between objectives. Growth against distribution: policies that raise growth through deregulation and decentralised wage determination tend to widen inequality. Growth against price stability, and growth against external stability. Every gain on one objective is partly paid for on another.
6. Structural and global constraints on distribution. Technological change raises the return to skills. Globalisation exposes low-skilled workers to international competition. Capital is mobile and can relocate in response to taxation while labour cannot. Asset price inflation driven by low interest rates concentrates wealth far more than income policies can offset. These constraints operate largely outside the reach of national policy.
7. What policy has achieved, which is the other side of the judgement. Be fair. Australia's progressive income tax and means-tested transfer system is one of the most targeted in the OECD, and it substantially reduces inequality, since the Gini coefficient for market income is far higher than for disposable income. Macroeconomic policy delivered nearly three decades of uninterrupted growth. Limitations are real but they are not paralysing.
8. Judgement on "to what extent". Limitations affect growth moderately: they constrain the timing and precision of policy but have not prevented sustained growth, and better institutional design through an independent central bank and medium-term fiscal frameworks has mitigated the worst of them. Limitations affect distribution substantially, because the binding constraints there are political and structural rather than technical, and no amount of better policy design removes them. The asymmetry is the answer to the question.

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What to do with this paper

Do it timed and closed-book first, and watch the unusual mark allocations in Section II, which are 11, 9, 9 and 11 rather than the standard 10 each. Mark against NESA's published guidelines before reading any of the above, then classify every lost mark as knowledge, verb, data, timing or diagram.

The single most valuable thing in this paper is Question 12 and its short-answer counterpart 22(c). Both turn on the same idea, that labour market slack shows up in hours as well as headcount, and that idea has appeared repeatedly since. If you can explain underemployment, the underutilisation rate and why they matter at the NAIRU, you are ahead of most of the state.

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Questions are described rather than reproduced. The 2020 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.