作者swallow1986 (Cecilia)
看板Economics
标题[请益] 请问一个题目
时间Tue Sep 18 21:13:36 2007
In which of the following ways is a monopolist different from a perfect
competitor?
(A)average cost will continuously drop as output expands.
(B)price is above marginal cost.
(C)the demand curve for the industry has a negative slope
(D)all of the above are true.
这题我想了很久觉得答案是D吧
(A)独占厂商不就是享有规模经济所以平均成本会持续降低(不太确定观念对不对)
(B)是因为P大於MR所以在MR=MC时P>MC
(C)独占厂商面对负斜率需求曲线 完竞厂商面对水平需求曲线
可是书本上的答案是给B
想请问大家怎麽想的
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◆ From: 220.139.219.155
※ 编辑: swallow1986 来自: 220.139.219.155 (09/18 21:18)
1F：→ kolun:不是每一种独占厂商ac都会一直下降唷 122.126.48.150 09/18 21:45
2F：→ zhiyue:(A)指的是自然独占，一般独占不是如此， 61.225.2.121 09/18 22:55
3F：→ zhiyue:非主要的差别 61.225.2.121 09/18 22:56
4F：→ zhiyue:(C)指的是产业(industry)，非个别厂商(firm 61.225.2.121 09/18 22:56
5F：→ zhiyue:产业面对的都是负斜率 61.225.2.121 09/18 22:57
6F：→ swallow1986:谢谢^^感激不尽220.139.219.155 09/18 23:14