College Board-Aligned Original Notes

AP Microeconomics Unit 4 Topic 1: Monopoly

Explain Monopoly by identifying decision-makers, incentives, constraints, and graph shifts.

Unit 4: Imperfect Competition. College Board exam weighting listed for this unit: 15%-22% of exam score.

What to Know

Know what each curve represents before deciding whether it shifts.
Separate short-run and long-run effects when the model requires it.
Label axes, curves, equilibrium points, and the direction of change.
Always connect this topic back to the larger unit: Imperfect Competition.

Detailed Notes

Monopoly should be analyzed as a chain of cause and effect. Identify the initial condition, the change, the affected model, and the final outcome.

In AP Microeconomics, graphs are not decoration. Curves represent behavior or constraints, so every shift or movement should match an economic explanation.

For AP-style answers, label the graph clearly and write the story in words: who responds, what changes, why the model moves, and what happens to price, quantity, output, employment, interest rates, or welfare.

Key Vocabulary

GDP

The market value of final goods and services produced within a country in a given period.

Inflation

A sustained increase in the overall price level.

Aggregate demand

Total planned spending on final goods and services in an economy.

Monetary policy

Central bank actions that influence money supply, interest rates, and economic activity.

Externality

A cost or benefit of production or consumption experienced by a third party.

Quick Practice

How would you explain Monopoly in one or two AP-style sentences?

Name the concept, apply it to a specific example or source, and explain the reasoning that connects the evidence to your answer.