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苏·Xu · 2022年07月21日

NO.PZ2016010802000068

问题如下:

Companies most likely have a well-defined supply function when the market structure is:

选项:

A.

oligopoly.

B.

perfect competition.

C.

monopolistic competition.

解释:

B is correct.

A company in a perfectly competitive market must accept whatever price the market dictates. The marginal cost schedule of a company in a perfectly competitive market determines its supply function.

考点:完全竞争市场特性

解析:在四类市场结构中,只有完全竞争市场的供给曲线是可以被定义描述的,它等于MC曲线大于AVC的那一段。

注意到,只有完全竞争厂商才有MR=P所以MC=MR=P, 在MC曲线上, P与产量方能对应。
但是对于其他类型的市场,P≠MR=MC,所以MC上点与产量对应不起来。所以只有完全竞争市场才存在这样的供给曲线。

其他三种为什么不可以被定义描述?

1 个答案

笛子_品职助教 · 2022年07月22日

嗨,从没放弃的小努力你好:


其他三种取决于厂家意愿,不容易被理论推导。

----------------------------------------------
就算太阳没有迎着我们而来,我们正在朝着它而去,加油!

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