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Unit 6: Market Failure and the Role of Government

5 dot points across 5 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How can government policy reduce the inefficiency of market power, and when does intervention help rather than hurt?

Topic 6.4 The Effects of Government Intervention in Different Market Structures: analyze antitrust policy, the regulation of a natural monopoly through marginal-cost and average-cost pricing, and how intervention can reduce deadweight loss when a market failure exists.
A focused answer to AP Microeconomics Topic 6.4, covering antitrust policy against market power, the regulation of a natural monopoly through marginal-cost and average-cost (fair-return) pricing, and how well-targeted intervention can reduce deadweight loss when a market failure exists, with worked exam-style questions.
10 min answer →

How do costs and benefits that spill onto third parties cause a market to over- or under-produce, and how can policy fix it?

Topic 6.2 Externalities: distinguish negative from positive externalities, show the divergence of private and social cost or benefit, identify the resulting overproduction or underproduction and deadweight loss, and explain corrective taxes and subsidies.
A focused answer to AP Microeconomics Topic 6.2, covering negative and positive externalities, the divergence between private and social cost or benefit, the overproduction and underproduction they cause, the deadweight loss, and corrective taxes, subsidies, regulation, and property rights, with worked exam-style questions.
11 min answer →

How do economists measure income inequality, and how do tax and transfer policies change the distribution?

Topic 6.5 Income and Wealth Inequality: distinguish income from wealth, measure inequality with the Lorenz curve and Gini coefficient, identify the sources of inequality, and explain how progressive taxes and transfers redistribute income.
A focused answer to AP Microeconomics Topic 6.5, covering the difference between income and wealth, the Lorenz curve and Gini coefficient, the main sources of inequality, and how progressive, proportional, and regressive taxes and transfer programs redistribute income, with worked exam-style questions.
9 min answer →

Why do free markets under-provide goods that no one can be excluded from, and how does the free-rider problem arise?

Topic 6.3 Public and Private Goods: classify goods by rivalry and excludability, explain the free-rider problem for public goods, and explain why markets under-provide public goods and how government provision responds.
A focused answer to AP Microeconomics Topic 6.3, covering the classification of goods by rivalry and excludability, public goods, common resources and the tragedy of the commons, the free-rider problem, and why markets under-provide public goods, with worked exam-style questions.
9 min answer →

When is a market outcome socially efficient, and what makes an outcome inefficient?

Topic 6.1 Socially Efficient and Inefficient Market Outcomes: define allocative efficiency as marginal social benefit equal to marginal social cost, identify deadweight loss, and explain what causes market failure.
A focused answer to AP Microeconomics Topic 6.1, covering allocative efficiency as marginal social benefit equal to marginal social cost, total surplus, deadweight loss, and the main sources of market failure, with worked exam-style questions.
9 min answer →