A Level H2 Economics Microeconomics Quiz

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

1. Opportunity Cost [2]

• Definition: The value of the next best alternative foregone.
• Application: The benefit of the transport upgrade that is lost by choosing the healthcare facility.

2. Movement vs Shift [4]

• Movement: Caused by a change in the price of the good itself; results in change in quantity demanded.
• Shift: Caused by non-price factors (income, tastes, prices of related goods); results in change in demand.

3. PED Calculation [4]

• Calculation: %$\Delta$QD / %$\Delta$P = -15% / 10% = -1.5.
• State: Price Elastic (absolute value > 1).

4. XED [4]

• Positive XED: Substitutes (Price of A $\uparrow$, Demand for B $\uparrow$).
• Negative XED: Complements (Price of A $\uparrow$, Demand for B $\downarrow$).

5. Raw Material Price Increase [6]

• Diagram: Supply curve shifts left (S $\rightarrow$ S1).
• Analysis: Higher input costs increase production costs $\rightarrow$ Supply decreases $\rightarrow$ Equilibrium price rises, equilibrium quantity falls.

6. Perfect Competition Characteristics [4]

• Any two: Large number of buyers/sellers, homogeneous products, perfect information, no barriers to entry/exit.

7. Monopolistic Competition [6]

• Non-price competition: Branding, advertising, quality improvement to create perceived differentiation.
• Price competition: Limited, as products are differentiated.

8. Collusive vs Non-Collusive [6]

• Collusive: Firms agree (explicitly or tacitly) to fix prices or output to maximize joint profits.
• Non-Collusive: Firms compete independently, often leading to price wars or strategic interdependence (kinked demand curve).

9. Monopoly Supernormal Profits [8]

• Diagram: MC, ATC, and Demand (AR) curves. Price (P) set above ATC at profit-maximizing output (MC=MR).
• Analysis: High barriers to entry prevent new firms from entering to erode profits.

10. Allocative Efficiency [8]

• Definition: P = MC (Resources allocated according to consumer preference).
• Analysis: In perfect competition, firms are price takers; in long-run equilibrium, P = MC, achieving allocative efficiency.

11. Ride-Hailing Merger [12]

• Disadvantages: Reduced competition $\rightarrow$ higher prices, lower service quality, less innovation.
• Advantages: Economies of scale $\rightarrow$ lower costs (potentially passed to consumers), improved network effects/efficiency.
• Evaluation: Depends on the degree of market power and whether the government (CCCS) imposes conditions.

12. Price Discrimination [8]

• Mechanism: Charging different prices to different segments based on their PED.
• Analysis: Higher price for inelastic demand, lower price for elastic demand $\rightarrow$ captures more consumer surplus as producer surplus.

13. Negative Externality [4]

• Definition: Cost imposed on a third party not involved in the transaction.
• Example: Pollution from factories in Jurong Island affecting air quality for residents.

14. Under-provision of Merit Goods [6]

• Analysis: Consumers ignore positive externalities (MSB > MPB) and under-consume based on private benefit. Firms ignore social benefits and under-produce.

15. Subsidy Diagram [8]

• Diagram: MPB, MSB, and MPC curves.
• Analysis: Subsidy shifts MPC downwards to MPC(sub). This increases quantity from Q(market) to Q(socially optimal), eliminating deadweight loss.

16. Free-Rider Problem [6]

• Analysis: Public goods are non-excludable and non-rival. People can enjoy the benefit without paying. Private firms cannot capture revenue $\rightarrow$ market failure.

17. Carbon Tax Evaluation [12]

• Pros: Internalizes the externality, provides revenue for government, encourages green tech.
• Cons: Difficulty in valuing the externality, regressive nature (hurts low-income), firms may relocate (carbon leakage).
• Conclusion: Effective if the tax is set at the marginal social cost and paired with alternatives.

18. Education Intervention [10]

• Reason 1: Positive Externalities (higher productivity for society, lower crime).
• Reason 2: Imperfect Information/Equity (ensuring equal opportunity regardless of income).
• Link: Both lead to under-consumption in a free market; intervention improves allocative efficiency.

19. Sustainable Fashion Evaluation [12]

• Support: Consumer sovereignty; shifts demand away from fast fashion.
• Critique: Information asymmetry (greenwashing), income constraints (sustainable clothes are pricier), magnitude of individual action vs. corporate pollution.
• Conclusion: Consumer choice is necessary but insufficient; regulation (e.g., taxes, laws) is required.

20. Government Failure [6]

• Cause: Information failure (government lacks data to set the correct tax/subsidy) or political pressure (lobbying).
• Result: Intervention may lead to a greater misallocation of resources than the original market failure.