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摇一摇 · 2023年08月11日

C为什么不对啊

NO.PZ2023010401000056

问题如下:

Which of the following statements concerning the Herfindahl–Hirschman Index (HHI) is most accurate?

选项:

A.The HHI is a useful measure of potential barriers to entry. B.An HHI of 0.05 would be analogous to having the market shared equally by 20 firms. C.The HHI is usually unaffected by mergers among the top market incumbents.

解释:

If there are M firms in the industry with equal market shares, the HHI equals 1/M. With 20 firms having equal shares, the HHI = 1/20 = 0.05.

中文解析:

如果行业中有M家公司拥有相等的市场份额,则HHI等于1/M。如果20家公司的股份相等,HHI = 1/20 = 0.05。

C为什么不对啊,N-firm concentration ratio才是对兼并不敏感啊

1 个答案

笛子_品职助教 · 2023年08月13日

嗨,爱思考的PZer你好:


HHI是指行业中各个公司份额的平方和。兼并会对HHI的结果产生影响。因此C不选。

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