单选题
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. Monopoly 10000
A. ①B. ② C. ③
【正确答案】
C
【答案解析】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).