Question

Suppose that three firms make up the entire wig manufacturing industry. One has a 60% market share, and the other two have a 20% market share each. The Herfindahl index of this industry is . Mane Attraction, one of the firms with a 20% market share in the wig manufacturing industry, leaves the market. This would cause the Herfindahl index for the industry to . Why is the largest possible value of the Herfindahl index is 10,000

Answer 1

Answer:

4400

Increase

c. An index of 10,000 corresponds to a monopoly firm with 100% market share

Explanation:

Here are the options to the last question

Why is the largest possible value of the Herfindahl index 10,000 ?

a. An index of 10,000 corresponds to 100 firms with a 1% market share each

b. An industry with an index higher than 10,000 is automatically regulated by the Justice Department

c. An index of 10,000 corresponds to a monopoly firm with 100% market share

HHI index = 60²  + 20² + 20² = 4400

If one of the firms leaves the industry, the market share would be distributed between the two firms and this would cause the HHI index to increase as firm's concentration would increase

If only one firm operates in the industry, its market share would be 100% and its HHI index would be 100² = 10,000. For an industry to exist there has to be at least one firm operating in the industry,