What does stretching a balloon have to do with equilibrium? Groups explore preconditioning by stretching a balloon to a point of equilibrium. They then measure the amount of force required to stretch the balloon to the same point several...

This site uses graphs to show how changes in demand would change a firm's output, price, and profits or losses in a monopolistically competitive market structure.

This site provides an in-depth examination of monopolistic competition, along with appropriate levels of output, price, and corresponding profits. This site is for the advanced student of economics.

South-Western College Publishing offers an outline written as a study guide for an exam, which gives basic definitions of different aspects of a market economy, graphs and examples, and sample study questions at the bottom.