FRQ: Externalities & Public Goods
外部性与公共品
正/负外部性、科斯定理、公共品的FRQ专项练习
Question 1 (5 points)
Draw a correctly labeled graph showing a negative externality. Show the marginal social cost (MSC), marginal private cost (MPC), marginal benefit (MB), the market quantity (Qm), and the socially optimal quantity (Qs). Shade the deadweight loss.
Type: Graph Drawing
Suggested time: 8 minutes
Suggested time: 8 minutes
Question 2 (5 points)
A factory produces pollution that harms nearby residents. The marginal cost of abatement is MCA = 100 - 2A, and the marginal benefit of abatement is MBA = 40 + A. (a) Find the socially optimal level of abatement. (b) If the government imposes a Pigouvian tax, what should it be?
Type: Calculation
Suggested time: 8 minutes
Suggested time: 8 minutes
Question 3 (5 points)
Explain why public goods are subject to the free-rider problem. Use the concepts of non-rivalry and non-excludability in your explanation. Give an example and suggest a government solution.
Type: Explanation
Suggested time: 8 minutes
Suggested time: 8 minutes
答题提示
- 图表题：确保正确标注坐标轴、曲线和关键点
- 计算题：写出完整计算过程，标明最终答案
- 解释题：先陈述结论，再用经济学原理解释
- AP考试FRQ每题约6分钟