A Level H1 Economics Market Failure Quiz

A-Level Economics H1 Quiz - Market Failure (Answer Key)

Total Marks: 40

Section A: Knowledge and Understanding (10 Marks)

1. C Reasoning: Negative externality of consumption occurs when the social cost of consumption exceeds the private cost, imposing costs on third parties (e.g., passive smoking).

2. D Reasoning: Public goods are non-excludable (cannot prevent non-payers from using) and non-rival (one person's use does not diminish another's).

3. C Reasoning: Because public goods are non-excludable, individuals can benefit without paying (free-rider problem). Private firms cannot charge a price effectively, so they do not produce the good.

4. C Reasoning: Education is a merit good because it generates positive externalities (benefits to society) and is often under-consumed if left to the free market due to information failure.

5. B Reasoning: In negative externalities of production, the social cost includes the private cost plus the external cost. Therefore, MSC > MPC, or MPC < MSC.

6. A Reasoning: Demerit goods (e.g., alcohol, tobacco) are over-consumed because consumers underestimate the long-term harm (information failure) and their consumption imposes costs on others (negative externalities).

7. B Reasoning: A specific tax increases the cost of production for firms, shifting the MPC (Supply) curve to the left (upwards) by the amount of the tax, ideally aligning it with the MSC.

8. B Reasoning: Asymmetric information (sellers know more than buyers) leads to adverse selection. Buyers, unable to distinguish quality, offer lower average prices, driving high-quality sellers out of the market.

9. B Reasoning: Subsidies require government funding, which comes from taxation. This creates an opportunity cost as those funds could have been used elsewhere (e.g., education or infrastructure).

10. C Reasoning: The Tragedy of the Commons refers to the over-exploitation of common access resources (like fish stocks or clean air) because no one owns them, leading to negative externalities.

Section B: Data Interpretation and Analysis (18 Marks)

11. Calculation of Total External Cost in 2020.

• Working: Total External Cost = Quantity Demanded × External Cost per Unit
• Calculation: 500 \text{ million} \times \0.05 = $25 \text{ million}$
• Answer: $25 million
• Marks: [1] for correct formula/setup, [1] for correct final answer.

12. Trend Description.

• Answer: As the price per bag increased from $0.00 in 2020 to$0.10 in 2022, the quantity demanded decreased steadily from 500 million to 300 million. This indicates an inverse relationship between price and quantity demanded, consistent with the Law of Demand.
• Marks: [1] for identifying the direction (price up, quantity down), [1] for referencing specific data points or describing the nature of the relationship.

13. Explanation of Market Failure.

• Answer:
  • In 2020, the price was $0.00, leading to a quantity of 500 million.
  • However, there is an external cost of $0.05 per bag. This means the Marginal Social Cost (MSC) is higher than the Marginal Private Cost (MPC).
  • The free market only considers private costs (which were effectively zero or very low for the consumer).
  • Therefore, the market over-allocates resources to plastic bags (500 million) compared to the socially optimal level (where MSC = MSB).
  • This over-consumption results in a welfare loss (deadweight loss) to society due to pollution/waste.
• Marks: [1] for identifying MSC > MPC, [1] for stating over-allocation/over-consumption, [1] for linking to welfare loss/efficiency, [1] for clear application to the data.

14. Definition of Merit Good.

• Answer: A merit good is a good or service that is deemed socially desirable and beneficial to individuals, but which is under-consumed in a free market. This under-consumption occurs due to information failure (consumers do not fully realize the long-term benefits) and/or positive externalities.
• Marks: [1] for "under-consumed", [1] for reference to information failure or positive externalities.

15. Analysis of Subsidy Impact.

• Answer:
  • A subsidy lowers the cost of production for healthcare providers.
  • This shifts the Supply curve (MPC) to the right (downwards) by the amount of the subsidy.
  • Diagram Description: The new equilibrium occurs at a lower price and a higher quantity.
  • Result: The price paid by consumers decreases, encouraging higher consumption, and the quantity of healthcare services traded increases, moving closer to the socially optimal level.
• Marks: [1] for shift direction (Supply right/down), [1] for effect on Price (decrease), [1] for effect on Quantity (increase), [1] for linking to social optimum/correction of under-consumption.

16. Limitation of Subsidies.

• Answer:
  • Inelastic Demand: If the demand for healthcare is price inelastic (necessary for life), a subsidy-induced price drop may not significantly increase quantity consumed.
  • Information Failure Persists: Even if cheaper, consumers may still not consume preventive care if they do not understand its benefits. Subsidies address price, not information.
  • Government Failure/Opportunity Cost: The cost of the subsidy may be too high relative to the benefit, or funds may be misallocated.
  • (Any one valid point explained well)
• Marks: [2] for identifying a valid limitation, [2] for explaining why it limits effectiveness.

Section C: Evaluation and Application (12 Marks)

17. Evaluation: Regulation vs. Taxes for Negative Externalities.

• Answer Framework:
  • Argument for Regulation:
    • Certainty: Regulations (e.g., bans, limits) provide a certain limit on pollution/output. Taxes do not guarantee a specific reduction in quantity if demand/supply is inelastic.
    • Moral Signal: Laws signal that the activity is socially unacceptable.
  • Argument for Taxes (Market-based):
    • Efficiency: Taxes internalize the externality, allowing the market to find the optimal quantity. Firms with lower abatement costs will reduce pollution more, leading to a cost-effective solution.
    • Revenue: Taxes generate government revenue that can be used to clean up the damage or subsidize green tech.
    • Flexibility: Firms can choose how to respond (reduce output or invest in cleaner tech).
  • Evaluation/Judgment:
    • Regulation is better for harmful goods where any consumption is dangerous (e.g., toxic waste).
    • Taxes are better for goods where some consumption is acceptable but needs to be priced correctly (e.g., carbon emissions).
    • "Always" is incorrect; the best policy depends on the elasticity of demand/supply and the severity of the externality. Often a combination is best.
• Marks:
  • [2] for explaining benefits of Regulation.
  • [2] for explaining benefits of Taxes.
  • [2] for comparative evaluation/judgment (addressing "always").

18. Explanation: Private Provision of Street Lighting.

• Answer Framework:
  • Non-excludability: It is impossible (or extremely costly) to prevent people who have not paid for street lighting from benefiting from it. You cannot "turn off" the light for non-payers.
  • Free Rider Problem: Because people cannot be excluded, rational individuals will wait for others to pay while they enjoy the benefit for free.
  • Non-rivalry: One person using the light does not reduce the amount of light available to others. The marginal cost of an additional person benefiting is zero.
  • Conclusion: Since private firms cannot charge a price effectively (due to free riders), they cannot cover costs or make a profit. Therefore, they will not provide the good, leading to missing markets.
• Marks:
  • [2] for explanation of non-excludability and free-rider problem.
  • [2] for explanation of non-rivalry.
  • [2] for conclusion linking to profit motive/missing market.

19. Distinction between Specific and Ad Valorem Tax.

• Answer:
  • Specific Tax: A fixed amount of tax charged per unit of the good (e.g., $0.05 per plastic bag). It shifts the supply curve parallel to the left by the amount of the tax.
  • Ad Valorem Tax: A tax charged as a percentage of the price of the good (e.g., 7% GST). It causes the supply curve to pivot upwards, meaning the tax amount increases as the price increases.
• Marks:
  • [1] for correct definition/description of specific tax.
  • [1] for correct definition/description of ad valorem tax.
  • [1] for clear distinction (fixed amount vs. percentage/pivot vs. parallel shift).

20. Government Information Provision for Demerit Goods.

• Answer:
  • Demerit goods are often over-consumed due to information failure (consumers underestimate long-term harms).
  • Government campaigns (e.g., anti-smoking ads, health warnings on packaging) provide accurate information about the negative effects.
  • This helps consumers make more informed rational choices, potentially shifting the demand curve to the left (decreasing demand) and reducing consumption towards the socially optimal level.
• Marks:
  • [1] for identifying information failure as the cause.
  • [1] for explaining the mechanism (campaigns/warnings educate consumers).
  • [1] for the outcome (demand decreases/consumption falls).