The Most Frequently Found Barriers to Entry in Oligopoly Include

The most frequently found barriers to entry in oligopoly include

A) the presence of large numbers of rival firms, firms that are price takers, and the likelihood of normal returns in the long run.
B) an inability to differentiate product, diseconomies of scale, and the need to advertise.
C) mutual interdependence, collusion, and the likelihood of government regulation.
D) the ambiguity of product groups and rising long-run average costs.
E) patents, large initial and continuing financial requirements, and access to basic inputs.