Which nations does the acronym BRIC stand for?

The theory of monopolistic competition was developed in two separate models by

A) Adam Smith and David Ricardo. B) John Kenneth Galbraith and John Maynard Keynes. C) Edward Chamberlin and Joan Robinson. D) Roger Leroy Miller and Paul Samuelson.

It is harder to explain the behavior of firms in oligopoly than in other market structures because in oligopoly

a. the firms act independently of each other b. firms base their decisions on what their rivals do c. only differentiated products are produced d. only homogeneous products are produced e. the demand curve can slope upward