Ed Just Finished an Empirical Study of Oligopoly

Multiple Choice

Ed just finished an empirical study of oligopoly. He found the following result: "In the examined industry, a firm's demand curve is such that other firms match price increases but do not match price reductions." What kind of oligopoly is the examined industry?

A) Sweezy model
B) Cournot model
C) Stackelberg model
D) None of the answers is correct.