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Marlow Works

AP Microeconomics / Unit 4

Unit 4 · 15–22%

Imperfect Competition

When firms face downward-sloping demand, price and efficiency change.

Start first lessonUnit practice

Topics

  • Monopoly
  • Price discrimination
  • Monopolistic competition
  • Oligopoly and strategic behavior

Lessons

Key terms

Original practice

Marlow Works questions. If this unit does not have its own items yet, you will see other questions from the same course.

1 of 3Supply and Demand · medium · multiple choice

A binding price ceiling is set below equilibrium in the market for rental apartments. What is the most likely result?

Original Marlow Works item — not a College Board question.

Take your time—this is practice, not a test.

Review checklist

  1. 01Draw demand, MR, MC, and ATC for a monopolist before shading profit.
  2. 02Compare monopoly quantity with the efficient P = MC quantity.
  3. 03For two-player games, write payoffs before circling a dominant strategy.

Related resources

External links with reuse status. Marlow Works is independent and does not copy restricted exam or textbook material.

  • Official / link only

    AP Microeconomics course page

    Official six-unit framework for markets, costs, and market failure.

    College Board · All rights reserved · accessed 2026-10-01

    Open source

  • CC BY — attribution required

    Principles of Microeconomics: Scarcity and Social Provisioning

    Open microeconomics background for scarcity, markets, and elasticity.

    Open Textbook Library listing · CC BY · accessed 2026-10-01

    Open source

  • Official / link only

    FRED economic data

    Federal Reserve economic data. Terms vary by series; do not scrape or ingest.

    Federal Reserve Bank of St. Louis · Varies by series · accessed 2026-10-01

    Open source