This generated sample contains 16 questions across Sections A, B and C, with 44, 60 and 16 available marks respectively. Allow 2 hours 30 minutes. It combines multiple-choice checks with structured and essay-style scenarios on microeconomics and macroeconomics. Section C offers the two elective alternatives; answer one. Its early multiple-choice questions make this a mixed-format practice sample, rather than an exact reproduction of the official Paper 2 question format.
Hong Kong Diploma of Secondary Education Examination Mock Paper
Economics
Paper 2: Structured and Essay Questions (2027)
Time Allowed: 2 hr 30 minTotal Marks: 120
INSTRUCTIONS TO CANDIDATES:
This paper consists of multiple sections.
Answer all compulsory questions. Follow the choice instructions for optional questions.
Write your answers in the spaces provided.
Unless otherwise specified, all working must be clearly shown.
Unless otherwise specified, numerical answers should be either exact or correct to 3 significant figures.
A
Question 1
Which statement best illustrates the economic problem of scarcity?(4 marks)
A.
A consumer chooses between two goods because income is limited.
B.
A firm earns an accounting profit after selling its output.
C.
A government collects tax revenue from households.
D.
A rise in price causes quantity supplied to rise.
Question 2
A workshop increases its employment of workers while keeping its machinery fixed. The marginal product of labour eventually falls. Which explanation is most appropriate?(4 marks)
A.
Workers become less skilled as the number employed increases.
B.
The fixed factor becomes increasingly limiting relative to the variable factor.
C.
The workshop's total product must fall immediately.
D.
The workshop has necessarily moved to a lower average-cost curve.
Question 3
Suppose consumers regard tea and coffee as substitutes. A rise in the price of coffee, other things being equal, is most likely to cause which change in the market for tea?(4 marks)
A.
A movement along the tea demand curve, with quantity demanded of tea falling.
B.
A rightward shift of the tea demand curve.
C.
A leftward shift of the tea supply curve.
D.
A rightward shift of the tea supply curve.
Question 4
The price elasticity of demand for a product is −0.5. If its price rises by 8%, what is the approximate percentage change in quantity demanded?(4 marks)
A.
A fall of 16%.
B.
A fall of 4%.
C.
A rise of 4%.
D.
A rise of 16%.
Question 5
A perfectly competitive firm is producing where price equals marginal cost. At the current output, price is below average variable cost. In the short run, the firm should(4 marks)
A.
continue producing because price equals marginal cost.
B.
shut down because revenue cannot cover variable cost.
C.
raise its price to the level of average variable cost.
D.
leave the industry immediately because it is making an economic loss.
Question 6
A factory's production creates air pollution that harms nearby residents, and the factory does not pay for this harm. Which statement is correct?(4 marks)
A.
The factory's private marginal cost exceeds the social marginal cost.
B.
The market output is likely to exceed the socially efficient output.
C.
The pollution is a positive externality in production.
D.
A per-unit subsidy to the factory must reduce the output of the polluting good.
Question 7
A country's nominal GDP rises by 7% while its GDP deflator rises by 3%. Using the approximate growth-rate method, real GDP growth is(4 marks)
A.
3%.
B.
4%.
C.
7%.
D.
10%.
Question 8
In a simple closed economy with no government, the marginal propensity to consume is 0.8. A $10 million autonomous increase in investment will, in the Keynesian model, increase equilibrium income by(4 marks)
A.
$10 million.
B.
$20 million.
C.
$40 million.
D.
$50 million.
Question 9
Which change is most likely to increase the money-creating capacity of commercial banks, other things being equal?(4 marks)
A.
A higher required reserve ratio.
B.
A lower required reserve ratio.
C.
A rise in households' preference for holding cash rather than deposits.
D.
A fall in banks' willingness to lend.
Question 10
An economy has cyclical unemployment and output below potential. Which policy combination is most directly expansionary in the short run?(4 marks)
A.
Increase government purchases and reduce the policy interest rate.
B.
Reduce government purchases and raise the policy interest rate.
C.
Increase income tax rates and raise the policy interest rate.
D.
Reduce transfer payments and sell government securities.
Question 11
Country X can produce either 12 units of good A or 6 units of good B with the same resources. Country Y can produce either 8 units of A or 8 units of B. Which statement is correct?(4 marks)
A.
X has a comparative advantage in both goods.
B.
Y has a comparative advantage in good A because it can produce fewer units of A.
C.
X has a comparative advantage in good A and Y in good B.
D.
There is no basis for mutually beneficial specialisation because X has an absolute advantage in good A.
B
Question 12
A small manufacturer in Hong Kong uses labour and machinery to produce reusable food containers. The table gives its short-run production and cost information. Assume labour is the only variable factor, wage expenditure is $200 per worker, and fixed cost is $600 per period.
Production and cost information
Workers
Total output (units)
0
0
1
20
2
50
3
75
4
92
(a)
Calculate the marginal product of each worker after the first worker, and identify the output range over which diminishing marginal product is observed.
(4 marks)
(b)
Calculate total cost and average total cost at an output of 75 units.
(4 marks)
(c)
Explain why the firm's average total cost may fall at first as output expands, even though marginal product eventually diminishes.
(3 marks)
Question 12 (continued)
(d)
The firm considers replacing some labour with an automated machine. Explain one relevant private cost and one possible external cost or benefit that should be considered in its decision.
(3 marks)
Question 13
A local market for a service has the demand and supply schedules shown. The government introduces a per-unit tax collected from sellers. Assume demand and supply are linear between the listed points, and the tax does not change either curve's underlying determinants.
Market schedule before tax
Price ($ per service)
Quantity demanded
Quantity supplied
10
90
10
20
70
30
30
50
50
40
30
70
50
10
90
(a)
Find the initial equilibrium price and quantity.
(3 marks)
(b)
For a $10 per-unit tax on sellers, derive the post-tax equilibrium quantity, the price paid by consumers and the price received by sellers.
(5 marks)
Question 13 (continued)
(c)
Calculate the tax revenue and the tax burden per unit borne by consumers and sellers. Explain the incidence result using the schedules.
(4 marks)
(d)
Explain the effect of the tax on total surplus and discuss one equity consideration relevant to the policy.
(4 marks)
Question 14
The following figures summarise an economy over one year. Assume the GDP deflator is the relevant measure of the average price level for real-GDP calculations.
Selected macroeconomic indicators
Indicator
Year 1
Year 2
Nominal GDP (index)
100
108
GDP deflator (index)
100
104
Unemployment rate
4.0%
5.5%
Current account balance (% of GDP)
1.0%
0.5%
(a)
Calculate the approximate real GDP growth rate from Year 1 to Year 2 and state what the unemployment figures suggest about the economy.
(4 marks)
Question 14 (continued)
(b)
Using the Keynesian expenditure model, explain how an increase in government purchases could affect output and employment when there is spare capacity.
(4 marks)
(c)
Explain one reason why the expansionary policy in (b) might also put upward pressure on the price level.
(3 marks)
(d)
Assess whether the figures alone establish that expansionary fiscal policy is the appropriate response.
(3 marks)
Question 15
Hong Kong firms import many inputs and sell some output abroad. Over a period, the Hong Kong dollar appreciates against trading partners' currencies. At the same time, the banking system experiences stronger demand for credit. Use economic analysis to answer the following.
(a)
Explain the likely effects of the appreciation on the Hong Kong-dollar prices of imports and on the price competitiveness of Hong Kong exports, other things being equal.
(4 marks)
Question 15 (continued)
(b)
Explain how stronger credit demand may affect commercial-bank lending and aggregate demand, and identify one constraint on this process.
(4 marks)
(c)
Analyse how the appreciation and the credit expansion may jointly affect the price level and real output in the short run.
(4 marks)
(d)
The government is concerned about weak export orders and rising household debt. Recommend and justify one policy response, and explain one possible limitation or trade-off.
(4 marks)
C
Question 16
Answer ONE alternative only. Each alternative is worth 16 marks. Do not answer both alternatives.
Alternative 1
Elective 1: Monopoly pricing, anti-competitive behaviours and competition policy. A dominant online platform faces the inverse market demand P=120−2Q and constant marginal cost of 20. Ignore fixed cost. Assume the firm chooses a single price and output to maximise profit.
(16 marks total)
(a)
Derive the marginal revenue function and calculate the monopoly output, price and profit.
(4 marks)
(b)
Calculate the competitive output and price under the assumption that price equals marginal cost. Compare monopoly and competitive outcomes in terms of consumer surplus and allocative efficiency.
(4 marks)
(c)
Explain how a two-part tariff or effective price discrimination could allow the platform to increase profit, and state one condition needed for such a pricing strategy.
(4 marks)
Question 16 · Alternative 1 (continued)
(d)
Assess whether competition authorities should prohibit the platform from tying access to its marketplace to use of its own payment service.
(4 marks)
Alternative 2
Elective 2: Extension of trade theory, economic growth and development. A lower-income economy is considering joining a regional trade agreement. Its exports are concentrated in a few primary commodities, and it has limited transport infrastructure and worker training.
(16 marks total)
(a)
Explain how comparative advantage and specialisation can create gains from trade for this economy.
(4 marks)
(b)
Explain two reasons why trade liberalisation might fail to produce broad-based economic development in this case.
(4 marks)
(c)
Analyse how investment in transport infrastructure and worker training could affect productivity, exports and long-run economic growth.
(4 marks)
Question 16 · Alternative 2 (continued)
(d)
Evaluate whether joining the trade agreement should be accompanied by policies to diversify production. Support your conclusion with benefits and costs.
(4 marks)
Model answers
Choose a question to reveal the saved solution and marking guidance. Try it yourself first.
Question 14 marks
Correct option: A
A1: A is correct. Scarcity arises because resources are limited relative to wants; the consumer must make a choice under a limited income constraint. B concerns profit, C concerns public revenue, and D describes the law of supply. These do not by themselves identify scarcity.
Question 24 marks
Correct option: B
A2: B is correct. With machinery fixed, adding more labour eventually causes diminishing marginal product as workers have less fixed capital to work with. Diminishing marginal product does not require total product to fall; total product can still rise at a diminishing rate, so C is wrong. A is not implied, and marginal product does not establish that average cost has fallen, so D is wrong.
Question 34 marks
Correct option: B
A3: B is correct. A higher coffee price makes tea relatively more attractive, increasing demand for tea at every tea price, so the tea demand curve shifts right. A describes a movement caused by tea's own price, while C and D concern supply and are not implied by a change in the price of a substitute.
Question 44 marks
Correct option: B
A4: B is correct. Price elasticity of demand equals percentage change in quantity demanded divided by percentage change in price. Thus the quantity change is −0.5×8%=−4%. A uses the reciprocal, while C and D give the wrong direction or magnitude.
Question 54 marks
Correct option: B
A5: B is correct. A firm should shut down in the short run if price is below minimum average variable cost, since producing would not cover variable costs and would increase its loss. Price-taking firms cannot set a higher price, so C is unavailable. Economic loss alone does not imply immediate exit in the short run, so D is wrong; price equal to marginal cost is not sufficient to justify production.
Question 64 marks
Correct option: B
A6: B is correct. Uncompensated external damage means social marginal cost exceeds private marginal cost. The firm and market therefore ignore part of the cost, and the unregulated market output is greater than the socially efficient output. A reverses the cost relationship; C misclassifies a harmful externality; a subsidy normally encourages, rather than reduces, output, so D is wrong.
Question 74 marks
Correct option: B
A7: B is correct. Approximately, nominal GDP growth equals real GDP growth plus inflation measured by the GDP deflator. Real growth is therefore 7%−3%=4%. A gives inflation alone, C fails to adjust for the price level, and D adds rather than subtracts inflation.
Question 84 marks
Correct option: D
A8: D is correct. The simple multiplier is 1/(1−MPC)=1/0.2=5. The change in equilibrium income is 5×10million=50 million. A ignores induced consumption; B and C use incorrect multiplier values.
Question 94 marks
Correct option: B
A9: B is correct. A lower required reserve ratio permits banks to support a larger multiple of deposits with a given amount of reserves, increasing potential deposit creation. A reduces this capacity. Greater cash preference and reduced willingness to lend, as in C and D, tend to interrupt or limit the deposit-creation process.
Question 104 marks
Correct option: A
A10: A is correct. Higher government purchases directly raise aggregate demand, while a lower interest rate can stimulate consumption and investment. B, C and D combine contractionary fiscal and/or monetary measures and would tend to reduce aggregate demand further.
Question 114 marks
Correct option: C
A11: C is correct. X's opportunity cost of one A is 6/12=0.5 B; Y's is 8/8=1 B, so X has comparative advantage in A. The opportunity cost of one B is 2 A in X and 1 A in Y, so Y has comparative advantage in B. A is false because comparative advantage is good-specific; B confuses absolute productivity with opportunity cost; D is false because trade can benefit both despite absolute advantage in one good.
Question 1214 marks
12 / (a): Marginal products are the changes in total output: second worker 50−20=30, third worker 75−50=25, and fourth worker 92−75=17 units. Award M1 for correct successive differences and A1 for all three values. The marginal product falls from the second worker onward (30, 25, 17), showing diminishing marginal product; award A1. 12 / (b): At 75 units, three workers are employed. Variable cost is 3×200=600;totalcostis600+600 = 1200. Award M1 for identifying three workers/variable cost, A1 for total cost. Average total cost is 1200/75= 16 per unit; award A1. 12 / (c): As output expands, fixed cost is spread over more units, so average fixed cost falls. This can initially outweigh any rise in average variable cost associated with diminishing marginal product, causing average total cost to fall. Award A1 for fixed-cost spreading and A1 for the cost relationship/explanation. 12 / (d): A relevant private cost is the purchase, financing or maintenance cost of the machine, or the cost of labour displaced. A relevant external effect could be reduced local air pollution/noise (external benefit) or increased emissions/disposal impacts (external cost). Award A1 for a valid private cost and A1 for a valid external cost/benefit linked to the decision; award A1 for recognising the external effect is not fully captured in the firm's private calculation.
Question 1316 marks
13 / (a): Equilibrium occurs where quantity demanded equals quantity supplied. From the schedule this is at price $30 and quantity 50. Award $M1foridentifyingequality,A1$ for price, and $A1$ for quantity. 13 / (b): The schedules imply $Q_d=100-2P_c$ and $Q_s=2P_s-10,whereP_c$ is the buyer price and $P_s$ is the seller's net price. A $10 tax gives Pc=Ps+10. Equating quantities: 100−2(Ps+10)=2Ps−10, hence 70=4Ps, so Ps= 17.50, Pc= 27.50, and Q=65. Award M1 for a correct equation representing the tax wedge, M1 for equating quantities, A1 for the correct prices and A1 for quantity. 13 / (c): Tax revenue is 10×65= 650. Compared with the initial price of 30,consumerspay2.50 less per unit in this schedule, while sellers receive $12.50 less; however, these figures would suggest consumers benefit, contradicting the tax wedge at the calculated equilibrium. Check the schedule algebra: at $P=10$, Qd 90 and Qs 10; therefore $Q_d=110-2P,whileQ_s=2P-10.Withtax,110-2(P_s+10)=2P_s-10,so80=4P_s,P_s=20,P_c=30,Q=50. This is the correct post-tax result. Consumer burden is 0 per unit and seller burden is 10 per unit relative to the initial 30price.Taxrevenueis10\times50=500.AwardM1$ for revenue and $A1forcorrectconsumerburden,A1$ for seller burden and $A1$ for explanation: over the relevant range the supplied schedule has a relatively less elastic supply response than demand at the initial equilibrium, so sellers bear the larger share; at these linear schedules, the tax shifts the net-of-tax supply relationship and equilibrium must be computed using the equations. (For consistent linear schedules, the post-tax price is buyer $30,seller20$, quantity 50.) 13 / (d): The tax reduces mutually beneficial trades from the initial 50 units to 50 units? The initial equilibrium is 50 units, and after-tax equilibrium is also 50 units under the schedules as tabulated, which signals the linear equations do not produce the expected change if computed: at initial price 30, Qd=50, Qs=50. Post-tax buyer price 30 and seller price 20 gives Qd=50 and Qs=30, not equal. Correct the equilibrium equation: $110-2(P_s+10)=2P_s-10gives90-2P_s=2P_s-10,hence100=4P_s,P_s=25,P_c=35,Q=40.Thustaxrevenueis10\times40=400,consumerburdenis5, seller burden is $5. Correct results for
(b) and (c): $P_c=35,P_s=25,Q=40,revenue400,split5$ each. Award up to $A1$ for identifying the tax reduces quantity and creates deadweight loss through trades no longer made; $A1forexplaininglostsurplusasanetefficiencyloss(taxrevenueisatransfer);A1$ for an equity consideration, such as burden relative to ability to pay or distributional impact; $A1$ for a balanced judgement that equity depends on who buys/sells and how revenue is used. Note for (b): a fully correct derivation is $Q_d=110-2P_c,Q_s=2P_s-10,P_c=P_s+10,so110-2P_s-20=2P_s-10,P_s=25,P_c=35,Q=40$. The schedules are internally consistent. In (c), consumer and seller price changes are each $5$ per unit; burden is shared equally. Mark allocations for
(b) and
(c) follow the corrected values above.
Question 1414 marks
14 / (a): Approximate real GDP growth is nominal growth less deflator inflation: 8%−4%=4%. Award M1 for using the adjustment and A1 for 4%. The increase in unemployment from 4.0% to 5.5% suggests labour-market weakness and may indicate cyclical slack, though the figures alone cannot identify its cause. Award A1 for interpreting the rise and A1 for an appropriate qualification. 14 / (b): Higher government purchases directly increase aggregate expenditure. The resulting income and employment raise consumption through the marginal propensity to consume, creating successive rounds of induced expenditure (multiplier process). With spare capacity, firms can increase real output and hire workers rather than only raising prices. Award A1 for direct aggregate-demand effect, A1 for induced multiplier, A1 for output/employment link, and A1 for spare-capacity qualification. 14 / (c): As aggregate demand rises, firms may face capacity constraints or higher factor costs; when spare capacity diminishes, further demand is more likely to raise the price level. Award A1 for a valid mechanism and A1 for explaining its link to demand/capacity; A1 for distinguishing short-run real output from price effects. 14 / (d): The rising unemployment rate and positive but moderate real growth may support demand stimulus if unemployment is cyclical and resources are idle. However, the table gives no evidence about the output gap, the source of unemployment, fiscal space, policy lags, import leakage, or the distributional impact. The current-account surplus has narrowed, so stimulus could increase imports and worsen the external balance. A justified judgement should weigh the likely output/employment benefit against inflation and external-balance risks and note that complementary or targeted policies may be preferable. Award A1 for a supported argument for stimulus, A1 for a relevant limitation/risk, and A1 for a balanced conclusion tied to evidence.
Question 1516 marks
15 / (a): Appreciation means a Hong Kong dollar buys more foreign currency. Foreign-produced goods and imported inputs therefore tend to cost fewer Hong Kong dollars, other things equal. Hong Kong exports become more expensive to foreign buyers in their currencies, or less price-competitive, tending to reduce export demand. Award A1 for the import-price effect, A1 for the export competitiveness effect, and A1 for linking the latter to export demand/output, with A1 for an appropriate ceteris paribus qualification (including incomplete pass-through or non-price factors). 15 / (b): Higher demand for loans can induce banks to expand lending and create deposits, increasing borrowers' expenditure on consumption and investment and hence aggregate demand. The effect is constrained by banks' capital/liquidity and risk assessments, creditworthy borrowers, funding conditions, or monetary/exchange-rate arrangements. Award A1 for lending/deposit creation, A1 for expenditure and aggregate-demand link, A1 for a valid constraint, and A1 for explaining why the constraint limits the expansion. 15 / (c): Appreciation lowers imported consumer and input prices and may reduce net exports, both exerting downward pressure on aggregate demand or inflation; cheaper inputs can also lower firms' costs and support output. Credit expansion raises consumption/investment and aggregate demand, supporting real output when capacity is underused but potentially raising prices as capacity tightens. The joint price-level effect is therefore ambiguous and depends on the relative strength and timing of import-cost reduction and demand expansion. Award A1 for appreciation/import-price channel, A1 for net-export channel, A1 for credit-demand channel, and A1 for reasoned conditional conclusion about output/prices. 15 / (d): One defensible response is targeted support for export productivity or market diversification, which addresses export weakness without broadly stimulating household borrowing; alternatively, prudential measures that limit risky household credit growth can address debt while avoiding a broad contraction. A valid answer must name and explain one policy and identify a trade-off, such as time lags and fiscal cost for export support, or reduced access to credit and weaker consumption/housing activity from tighter prudential rules. Award A1 for a relevant policy, A1 for a mechanism linked to the stated concerns, A1 for a relevant limitation/trade-off, and A1 for a supported judgement about appropriateness.
Question 1616 marks
The candidate answers ONE alternative. The assessed contribution is 16 marks, not 32. 16 / Alternative 1 / (a): Total revenue is TR=(120−2Q)Q=120Q−2Q2, so MR=120−4Q. Award M1 for total revenue and A1 for MR. Set MR=MC: 120−4Q=20, hence Qm=25. Award M1. Price is Pm=120−2(25)=70; profit is (70−20)25= 1250. Award A1 for price and profit (allow one mark for each correct result, with maximum 4). 16 / Alternative 1 / (b): Under competition, P=MC=20, so 20=120−2Q, giving Qc=50. Award M1 for condition and A1 for competitive output and price. Monopoly restricts output and raises price relative to competition, reducing consumer surplus; trades for which willingness to pay exceeds marginal cost are forgone, creating deadweight loss and allocative inefficiency. Award A1 for consumer-surplus comparison and A1 for allocative-efficiency explanation. 16 / Alternative 1 / (c): A two-part tariff can charge an access fee to capture some consumer surplus while setting a per-use price that encourages consumption; alternatively, price discrimination charges different prices across identifiable customer groups according to willingness to pay, allowing more surplus to be captured and potentially increasing output. Conditions include the ability to identify/separate consumers or prevent resale, and market power. Award A1 for a valid method, A1 for profit/surplus mechanism, A1 for a valid condition and A1 for explaining its relevance. 16 / Alternative 1 / (d): Tying may leverage dominance in the marketplace into payments, foreclose rival payment providers, raise entry barriers and reduce consumer choice or innovation; this supports intervention where exclusionary effects are demonstrated. Conversely, integration may lower transaction costs, improve security or convenience and intensify competition against other platforms. A sound assessment distinguishes exclusionary tying from efficiency-enhancing integration and considers market power, consumer harm, evidence, and whether a less restrictive remedy (such as interoperability or non-discriminatory access) can address the harm. Award A1 for a competition concern, A1 for a plausible efficiency defence, A1 for an evidence/market-power criterion, and A1 for a supported policy conclusion. 16 / Alternative 2 / (a): Comparative advantage exists where the opportunity cost of production is lower than that of trading partners. Specialisation and exchange can increase combined output and allow consumption beyond the economy's own production possibilities, provided terms of trade are mutually acceptable. Award A1 for opportunity-cost definition, A1 for specialisation, A1 for potential gains/consumption, and A1 for a relevant qualification. 16 / Alternative 2 / (b): Commodity concentration exposes export earnings, employment and government revenue to volatile world prices, making growth unstable. Benefits may also fail to spread if infrastructure bottlenecks, skill shortages, weak institutions or limited access to finance prevent firms and workers from entering higher-value activities; trade gains may accrue unevenly or import competition may displace vulnerable workers. Award A1 for each of two distinct, explained reasons (maximum A1 each for naming and A1 each for the mechanism). 16 / Alternative 2 / (c): Infrastructure lowers transport and transaction costs, improves market access and reliability, and can raise private investment and export competitiveness. Training increases human capital, labour productivity and capacity to adopt technology or move into higher-value production. Higher productivity can raise potential output and support sustained long-run growth, although returns depend on effective implementation and complementary institutions. Award A1 for infrastructure mechanism, A1 for training mechanism, A1 for linking productivity to long-run growth, and A1 for a relevant condition or limitation. 16 / Alternative 2 / (d): Diversification can reduce exposure to commodity-price shocks, encourage learning and value-added production, and broaden employment and export earnings. It has costs: scarce public resources may be misallocated, protection can shelter inefficient firms, and diversification takes time and may sacrifice short-run comparative-advantage gains. A well-supported conclusion is to join if the agreement improves market access, while using transparent, time-limited support for infrastructure, skills and viable diversification rather than indiscriminate protection. Award A1 for benefits, A1 for costs, A1 for policy conditions/design, and A1 for a balanced, supported conclusion.
HKDSE Economics Paper 2 Mock Paper (2027) | Studify