答案和详解如下： 31、Correct answer is C "Perfect Competition," Michael Parkin 2008 Modular Level I, Vol. 2, pp. 159-168 Study Session 5-18-d discuss how a permanent change of demand or changes in technology affect price, output, and economic profit In the case of constant-cost industries, the long-run supply curve is perfectly elastic or horizontal. Therefore, a permanent increase in demand would have no effect on the price in the long run. In the case of an increasing-cost industry, the long-run supply curve slopes upward and a permanent increase in demand would result in an increase in the price.
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发表于 2009-2-1 14:47
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