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A Level H1 Economics Market Failure Quiz
Free A Level H1 Econs Market Failure quiz, HY3 Exam version, with questions, answers, and A Level-style practice for Singapore students.
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Questions
A-Level Economics H1 Quiz - Market Failure
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Class:
Date:
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Duration: 60 minutes
Total Marks: 40
Topic: Market Failure (Theme 2.2)
Instructions:
- Answer all 20 questions.
- Section A: Short structured questions (1–5). Section B: Data and diagram interpretation (6–13). Section C: Source-based and evaluation (14–20).
- Use diagrams where requested. Show working for calculation-based items.
- Marks for each question are shown in brackets.
Section A: Short Structured Questions (1–5)
1. Define market failure. [2]
2. State two characteristics of a public good. [2]
3. Give one example of a negative externality in consumption. [1]
4. Give one example of a positive externality in production. [1]
5. Explain what is meant by information failure. [2]
Section B: Data and Diagram Interpretation (6–13)
6. With reference to the table below, compare the per-household air pollution cost in Town A and Town B from 2018 to 2022. [2]
| Year | Town A ($/household) | Town B ($/household) |
|---|---|---|
| 2018 | 120 | 90 |
| 2022 | 180 | 150 |
7. Describe the trend in total national subsidy for electric vehicles from 2019 to 2023 shown below. [2]
| Year | EV Subsidy ($ million) |
|---|---|
| 2019 | 40 |
| 2020 | 55 |
| 2021 | 70 |
| 2022 | 95 |
| 2023 | 130 |
8. Using the demand and supply diagram, explain how a negative consumption externality leads to overproduction relative to the social optimum. [4]
Image pending generation: diagram for Q8.
9. Explain, using a diagram, how a subsidy can correct a positive production externality. [4]
Image pending generation: diagram for Q9.
10. The table shows units of vaccination and marginal private cost (MPC) and marginal external benefit (MEB). Compute marginal social cost (MSC) for each unit. [3]
| Units | MPC ($) | MEB ($) | MSC ($) |
|---|---|---|---|
| 1 | 20 | 8 | |
| 2 | 26 | 8 | |
| 3 | 34 | 8 |
11. Using the data in Q10, if market demand (MSB) price is 40atunit1,38 at unit 2, $34 at unit 3, state the market equilibrium unit and the socially optimal unit. [2]
12. With reference to Extract 1, explain how lack of information about sunscreen leads to market failure. [2]
Extract 1: A survey found 60% of youths underestimated UV risk and bought fewer protective products than recommended by health authorities.
13. Draw a PPC diagram to show under-allocation of resources to a public good due to market failure. [3]
Image pending generation: diagram for Q13.
Section C: Source-Based and Evaluation (14–20)
14. Read Extract 2. Identify one cause of market failure mentioned. [1]
Extract 2: Local beekeepers provide pollination that raises crop yields for nearby farms, but they receive no payment from farmers for this service.
15. Using Extract 2, explain why the free market output of beekeeping is likely below the social optimum. [3]
16. Discuss whether government provision of street lighting is justified by the characteristics of public goods. [4]
17. Evaluate the use of a carbon tax to correct negative externalities from factory emissions. [4]
18. With reference to Table X, compare the external cost per tonne of plastic waste between 2020 and 2024 for two firms. [2]
| Year | Firm P ($/tonne) | Firm Q ($/tonne) |
|---|---|---|
| 2020 | 15 | 22 |
| 2024 | 25 | 30 |
19. Explain how tradable permits can reduce pollution externalities. [3]
20. Evaluate whether information campaigns alone are sufficient to correct information failure in the market for health insurance. [4]
Answers
A-Level Economics H1 Quiz - Market Failure: Answer Key
Total Marks: 40
Topic: Market Failure (Theme 2.2)
Section A: Short Structured Questions (1–5)
1. Define market failure. [2]
Answer: Market failure occurs when the free market fails to allocate resources efficiently, so that marginal social benefit (MSB) ≠ marginal social cost (MSC). [1] It results in a net welfare loss (deadweight loss) to society. [1]
Teaching note: Efficiency requires MSB = MSC. When this fails due to externalities, public goods, or information failure, the market outcome is not socially optimal.
2. State two characteristics of a public good. [2]
Answer: Non-rivalry (one person's consumption does not reduce another's) [1]; non-excludability (non-payers cannot be prevented from consuming). [1]
Common mistake: Confusing with merit goods; public goods are not provided profitably by the market.
3. Give one example of a negative externality in consumption. [1]
Answer: Cigarette smoking (passive smoke harms others) / loud music disturbing neighbours. [1]
4. Give one example of a positive externality in production. [1]
Answer: Beekeeping (pollination benefits farms) / factory training workers who later benefit other firms. [1]
5. Explain what is meant by information failure. [2]
Answer: Information failure occurs when consumers or producers lack accurate information [1] leading to decisions that do not reflect true private or social costs/benefits (e.g., under-consumption of merit goods). [1]
Section B: Data and Diagram Interpretation (6–13)
6. [2]
Answer: Both towns' per-household air pollution cost increased from 2018 to 2022. [1] Town A was higher than Town B in both years (120vs90; 180vs150) and the gap widened from 30to60. [1]
Marking: 1 mark for direction, 1 for comparative magnitude.
7. [2]
Answer: EV subsidy rose steadily from 40min2019to130m in 2023. [1] Increase was accelerating (15, 15, 25, 35 added each year). [1]
8. [4]
Answer: In the diagram, MPB > MSB by external cost. [1] Market equilibrium at Qm where MPB = MSC. [1] Social optimum at Qs where MSB = MSC. [1] Since MSB < MPB, Qm > Qs, so market overproduces relative to social optimum, causing deadweight loss. [1]
Teaching: Negative consumption externality → private benefit overstates social benefit → excess output.
9. [4]
Answer: MPC > MSC by external benefit. [1] Market equilibrium Qm where MPC = MSB is below Qs. [1] Subsidy lowers MPC to MSC, shifting supply right. [1] New equilibrium at Qs where MSC = MSB, correcting underproduction. [1]
10. [3]
MSC = MPC – MEB (since external benefit reduces social cost relative to private).
Unit 1: 20 – 8 = 12 [1]
Unit 2: 26 – 8 = 18 [1]
Unit 3: 34 – 8 = 26 [1]
11. [2]
Market equilibrium: MPC = MSB → Unit 1 (MPC 20 < 40), Unit 2 (26 < 38), Unit 3 (34 = 34) → Qm = 3. [1]
Social optimum: MSC = MSB → Unit 1 (12 < 40), Unit 2 (18 < 38), Unit 3 (26 < 34), Unit 4 would be needed but not given; highest where MSC ≤ MSB is Unit 3 (26<34) but next would exceed; given data Qs = 3 also, but if MSB at 4 unknown, state Qs ≥ 3. For exam: market = 3, social optimum = 3 on given data but note external benefit means more would be optimal if demand continued. [1]
Simplified marking: Market unit = 3, Social optimal unit = 3 (based on table; explain MEB means more desirable beyond).
12. [2]
Answer: Youths underestimated UV risk (information failure) [1] so they consumed less sunscreen than socially optimal, causing potential health externalities. [1]
13. [3]
Answer: PPC drawn concave. [1] Point A inside curve with low public good Y. [1] Annotation showing under-provision / inefficiency. [1]
Section C: Source-Based and Evaluation (14–20)
14. [1]
Answer: Positive externality in production (beekeeping benefits farms unpaid). [1]
15. [3]
Answer: Beekeepers receive only private benefit (honey) but generate external benefit (pollination). [1] MPC > MSC, so market output below social optimum. [1] Free market under-provides beekeeping relative to MSB = MSC point. [1]
16. [4]
Answer: Street lighting is non-rival (all can use) [1] and non-excludable (cannot fence light) [1] so private firms cannot charge → market fails to provide [1] thus government provision justified to achieve efficiency. [1]
Descriptor: 2 marks for characteristics, 2 for application.
17. [4]
Answer: Carbon tax raises private cost to include external cost, shifting MPC toward MSC. [1] Reduces emissions to social optimum. [1] But tax level hard to set; may hurt competitiveness. [1] Revenue can fund clean tech; evaluation needs balance of equity and efficiency. [1]
18. [2]
Answer: Both firms' external cost per tonne rose (P: 15→25, Q: 22→30). [1] Q remained higher than P in both years; gap narrowed from 7 to 5. [1]
19. [3]
Answer: Government sets total permit cap. [1] Firms trade permits; low-cost reducers sell to high-cost. [1] Achieves emission cut at lowest cost, internalising externality. [1]
20. [4]
Answer: Campaigns improve information, raising merit good consumption. [1] But may not change behaviour if other barriers (price, preference). [1] Need subsidies/regulation alongside. [1] Therefore not sufficient alone; combination policy more effective. [1]
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