A Level H2 Economics Practice Paper 3

Answer Key - A-Level Economics H2 Quiz (Microeconomics)

Section A: Price Mechanism & Elasticity

1. Opportunity Cost: The value of the next best alternative foregone. In this case, the benefit of the healthcare improvements that are sacrificed to fund education (or vice versa). (2m)
2. Complementary Goods: A decrease in price of Good A $\rightarrow$ increase in demand for Good A $\rightarrow$ increase in demand for Good B (the primary good) as they are consumed together. (3m)
3. PED Calculation: $\frac{-15\%}{10\%} = -1.5$. Absolute value is 1.5. Since $1.5 > 1$, the product is price elastic. (3m)
4. YED: Normal goods have a positive YED (demand increases as income rises). Inferior goods have a negative YED (demand decreases as income rises). (4m)
5. Diagram/Price Mechanism:
   • Shift Demand curve for EVs to the right.
   • Price increases, Quantity increases.
   • Higher price signals firms to allocate more resources (land, labor, capital) to EV production. (6m)

Section B: Market Structures

6. Perfect Competition: Large number of buyers/sellers; Homogeneous products; Perfect information; No barriers to entry/exit. (Any two: 2m)
7. Monopolistic Competition: Firms use non-price competition (branding, advertising, quality differentiation) to create perceived differences and gain market power. (4m)
8. Collusion: Agreement between firms to limit competition (e.g., price fixing). Unstable because firms have an incentive to "cheat" by lowering prices slightly to capture more market share. (5m)
9. Monopoly Inefficiency: Diagram showing $P > MC$ at the profit-maximizing output. Allocative efficiency occurs where $P = MC$. The gap creates a deadweight loss. (6m)
10. Merger Evaluation:
    • Disadvantage: Increased market power, higher prices, reduced choice, potential for X-inefficiency.
    • Benefit: Economies of scale leading to lower costs, which might be passed to consumers; improved service quality through R&D.
    • Judgment: Depends on the degree of market concentration and government regulation (e.g., CCCS). (10m)
11. Contestability: The ease with which new firms can enter/exit. If sunk costs are low, the threat of entry forces incumbents to keep prices closer to competitive levels to deter entry. (6m)
12. Comparison:
    • Perfect Competition: $P = MC = min AC$ (Productive and Allocative efficiency).
    • Monopolistic Competition: $P > MC$ and $P = AC$ (Normal profits, but not productively efficient due to excess capacity). (8m)

Section C: Market Failure & Government Intervention

13. Negative Externality: A cost imposed on a third party who is not part of the transaction. Example: Factory pollution affecting local residents' health. (2m)
14. Public Goods: Non-excludable and non-rivalrous. Leads to the "free-rider problem" where individuals lack incentive to pay, resulting in zero private supply. (5m)
15. Education Intervention:
    • Positive Externalities: Education benefits society (higher productivity, lower crime), so $MSB > MPB$.
    • Information Failure: Students may undervalue the long-term returns of education. (8m)
16. Subsidy Diagram: Shift Supply curve right/down. Price falls, quantity increases from $Q_{market}$ toward $Q_{socially\_optimal}$. (6m)
17. Asymmetric Information: Sellers know more about the car's quality than buyers. Buyers offer a lower average price, driving high-quality cars out of the market, leaving only "lemons." (5m)
18. Permits vs Tax:
    • Permits: Guaranteed quantity of pollution reduction; creates a market for permits.
    • Tax: Provides a price signal; generates government revenue.
    • Evaluation: Permits are more certain for environmental targets; taxes are easier to administer. (10m)
19. Consumer Choice Evaluation:
    • Support: Demand shifts can signal firms to change production methods.
    • Critique: Information asymmetry (greenwashing); income constraints (sustainable clothes are pricier); externalities are too large for individual action to solve.
    • Conclusion: Individual choice is necessary but insufficient; government regulation (e.g., taxes on waste) is required. (12m)
20. Price Ceiling:
    • Benefit: Increases affordability/equity for low-income patients.
    • Drawback: Creates a shortage (demand > supply); may lead to black markets or reduced quality/innovation. (6m)