4.1

Introduction to Imperfectly Competitive Markets

AP Microeconomics

What Makes a Market Imperfectly Competitive?

Market Power and the Demand Curve

Why MR < P for Price Makers

Numerical Example

The MR and Demand Relationship

1234567891011121314-2-11234567891011121314Quantity$/unitMR=0 (TR max)D=0DMR

MR has twice the slope of D — it reaches zero at half the quantity

Elasticity and Total Revenue

Barriers to Entry

Measuring Market Power: The Lerner Index

AP Exam Tips

Common Mistakes