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  You are the manager in a market composed of eight firms, each of which has a 12

Accounting Dec 05, 2020

 
You are the manager in a market composed of eight firms, each of which has a 12.5 percent market share. In addition, each firm has a strong financial position and is located within a 100-mile radius of its competitors
a) Calculate the premerger Herfindahl-Hirschman index (HHI) for this market. 
b) Suppose that any two of these firms merge. What is the postmerger HHI? 

Expert Solution

N= Number of firms

w= Market share of ith firm

i= ith firm

a.)

Given,

N= 8

i= 1

w= 12.5%

Put the values in the formula;

HHI= 10000* (8* (12.5%)^2)

= 1250

 

b.)

There will be 7 firms in total if two firm merge and 6 with market share 12.5% each and also one firm with 25% share in market.

So,

HHI= 10000* (6* (12.5%)^2+ (25%)^2)

= 10000* (0.09375+ 0.0625)

= 1562.5

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