NO.PZ2018062003000052
问题如下:
Which of the following descriptions about perfectly competitive market is most likely correct?
选项:
A.In the long run, a firm can only earn normal profits.
B.In the long run, there are opportunities for a firm to gain positive economic profits.
C.In the long run, a firm will have negative economic profits
解释:
A is correct.
Under the perfect competition, price is equal to marginal cost in the long run, therefore a firm can only gain normal profits.
考点:正常利润。
解析:在完全竞争的市场条件下,厂商的利润为正常利润,即经济利润为0。
因为如果经济利润大于0,那么会有更多的厂商进入该市场瓜分利润,从而让经济利润降低为0.
如果经济利润小于0,那么现在市场中的厂商会退出市场,供给减少,价格增加从而使得留下的那些厂商的经济利润由负数上升到0.
如题