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单项选择题

Consider a firm in an oligopoly market that believes that the demand curve for its product is more elastic above a certain price than below this price. This belief fits most closely to which of the following models

A. Dominant firm model.
B. Kinked demand model.
C. Variable elasticity model.
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单项选择题As compared with acting independently, a group of oligopolistic companies operating with perfect cooperation will most likely experience:

A. an increase in both output and prices.
B. an increase in output and a decrease in prices.
C. an increase in prices and a decrease in output.

单项选择题Which of the following is least likely a feature that monopolistic competition and perfect competition have in common

A. Output occurs where MR=MC.
B. Zero economic profits in the long run.
C. Extensive advertising to differentiate products.