AP Microeconomics 70% Sectional Test: Units 1 Through 4
AP Microeconomics 70% sectional covers all four market structures — perfect competition, monopoly, monopolistic competition, and oligopoly game theory practice.
Checkpoint 3: All Four Market Structures
The 70% sectional is the most graphically demanding checkpoint in the GradePerfect sectional sequence. By adding Unit 4 content on imperfect competition to the cumulative foundation, this test challenges you to compare and contrast all four market structures — a skill that is central to AP Microeconomics and appears in both MCQ and long FRQ sections of the AP exam.
What This Sectional Tests
Cumulative Units 1 Through 3
Questions from Units 1 through 3 continue to appear. Expect supply/demand graph analysis, elasticity, cost curve interpretation, and profit maximization questions from perfect competition to be integrated with the new Unit 4 content.
Unit 4 Content: Imperfect Competition
The Unit 4 material tested in this sectional includes:
- Drawing the monopoly diagram with a downward-sloping demand curve, the MR curve positioned below demand, and the MC and ATC curves in their standard positions.
- Finding the profit-maximizing output at MR = MC and the corresponding price on the demand curve.
- Identifying the profit rectangle (area between price and ATC at the profit-maximizing output) and the deadweight loss triangle.
- Comparing the monopoly outcome to the competitive outcome in terms of price, quantity, and efficiency.
- Drawing the short-run and long-run equilibria for a monopolistically competitive firm.
- Identifying excess capacity in monopolistic competition — the gap between the long-run equilibrium output and the minimum ATC output.
- Interpreting payoff matrices for oligopoly game theory problems — identifying dominant strategies and Nash equilibria.
Comparing Market Structures: A Core AP Skill
AP Microeconomics exam questions frequently ask students to compare outcomes across market structures. The 70% sectional specifically includes questions that require you to state whether price is above, equal to, or below marginal cost in each structure, and to explain the efficiency implications. Understanding why perfect competition achieves allocative efficiency (P = MC) while monopoly does not (P greater than MC) is a recurring AP FRQ element.
How to Prepare for the 70% Sectional
- Review the monopoly diagram until you can draw it from memory with all curves labeled correctly.
- Practice identifying deadweight loss triangles in monopoly graphs by comparing to the competitive outcome.
- Work through several payoff matrix problems until identifying dominant strategies and Nash equilibria is fast and reliable.
- Review the long-run zero-profit diagram for monopolistic competition, focusing on where the demand curve is tangent to ATC.