中等ECON-MSTR-013
Which feature most clearly separates oligopoly from monopolistic competition?
A. A few firms, each of which must consider rivals' reactions✓ 答案
B. Free entry and many sellers
C. A horizontal demand curve for each firm
D. A legal ban on advertising
解說
Interdependence among a few firms is the oligopoly marker. Many sellers and free entry fit monopolistic competition. A horizontal demand curve fits a price-taking firm.