答案和详解如下： 30、Correct answer is D "Monopolistic Competition and Oligopoly," Michael Parkin 2008 Modular Level I, Vol. 2, pp. 228-230 Study Session 5-20-b determine the profit-maximizing (loss-minimizing) output under monopolistic competition and oligopoly, explain why long-run economic profit under monopolistic competition is zero, and determine if monopolistic competition is efficient As the companies agree to restrict output, market price will rise above average total cost and joint economic profits will accrue. | 
发表于 2009-2-1 14:35
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