Full Mock Test 7: Externalities and Market Failure Emphasis
AP Microeconomics Full Mock Test 7 focuses on externalities, Pigouvian taxes and subsidies, public goods, deadweight loss, and market failure FRQ practice.
Market Failure as a Core AP Microeconomics Theme
Full Mock 7 places concentrated emphasis on Unit 6 — externalities, Pigouvian taxes and subsidies, public goods, and the Coase theorem. Market failure content appears in both MCQ and FRQ sections of the AP exam and is frequently paired with supply/demand or market structure analysis in multi-part questions.
What Full Mock 7 Covers
Externality Graph Analysis in MCQ
Multiple-choice questions in Mock 7 frequently present a market diagram with both a private cost or benefit curve and a social cost or benefit curve. Students must:
- Identify whether the market exhibits a positive or negative externality.
- Determine whether the market overproduces or underproduces relative to the socially efficient quantity.
- Identify the deadweight loss area on the diagram.
- Calculate the correct Pigouvian tax or subsidy needed to achieve the socially efficient output.
Free-Response: Pigouvian Policy and Public Goods
The long FRQ in Mock 7 presents a market with a negative externality from production. Students must draw the market with MPC and MSC curves, identify the market output and socially efficient output, calculate the deadweight loss, and prescribe the correct Pigouvian tax. A follow-up part asks what happens to the market equilibrium after the tax is imposed.
Short FRQ questions address public goods classification (excludability and rivalry) and the Coase theorem — specifically, the conditions under which private bargaining can resolve an externality without government intervention.
Connecting Externalities to Earlier Units
AP FRQs in this domain sometimes begin with a standard supply/demand market, introduce an externality, and then ask about government policy responses. Mock 7 includes questions that require this cross-unit connection — specifically, integrating the Unit 2 supply/demand framework with Unit 6 externality analysis. Recognizing that a Pigouvian tax shifts the supply curve upward (just like any per-unit tax) connects the two units and simplifies the graphical analysis.