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Which of the following measures is used by the Justice Department to evaluate the competitive effects...

Which of the following measures is used by the Justice Department to evaluate the competitive effects of proposed mergers?

a. The Lerner Index.

b. The eight-firm concentration ratio for an industry.

c. The four-firm concentration ratio for an industry.

d. The Herfindahl-Hirschman Index.

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Answer #1

Option D

Mergers and acquisitions are common in the business world. It is a part of the business strategy where sometimes it vertical or horizontal. The antitrust division of the justice department can disapprove any merger it seems that it will not good for the overall market. Justice Department uses the Herfindahl-Hirschman index for this which is the sum of the squared market share of each company in that sector. So if there is only 1 company then the HHI value would be 10000 which is a monopoly.

HHI above 2000 is considered a concentrated market and if any merger raises HHI value by 200 then the Justice Department raises concerns about that.

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