Which of the following best describes the

问题单项选择题

Which of the following best describes the relationship between the Herfindahl-Hirschman Index and the indicated type of market Market type Herfindahl-Hirschman Index （） ①A. Perfect competition 1800 ②B. Monopolistic competition 100 ③C. Monopoly10000

A. ①

B. ②

C. ③

答案

参考答案：C

解析：

The Heffindahl-Hirschman Index (HHI) has a theoretical range of near zero to 10000. The HHI is very low in a highly competitive and increases to 10000( = 1002) for an industry with only one firm, e. g. , a monopoly. An HHI between 1000 and 1800 is considered moderately competitive (monopolistic competition), while an HHI greater than 1800 indicates a market that is not competitive (oligopoly).