The existence of a kinked demand curve under oligopoly conditions may result in

Which of the following statements correctly identifies a similarity between network effects and economies of scale?

A) Both are related to costs incurred by a firm. B) Both act as barriers to entry in a market. C) Both act as disincentives to monopolies. D) Both are related to the number of consumers using a firm's product.

Which of the following is a necessary feature of the notion of the market as a competitive process and the model of perfect competition?

A) Freedom of entry B) Price taking behavior C) Perfect and complete information D) All firms produce identical products. E) All of the above.