The airline industry has four major firms with the following
 
 The airline industry has four major firms with the following market shares: 10%, 20%, 30%, 40%. The HHI value for this industry is _____ and the industry is considered _____.
3000; highly concentrated
1500; moderately concentrated
100; not concentrated…100
3000; moderately concentrated
Solution
Calculate HHI -
HHI = (Market share of Firm 1)2 + (Market share of Firm 2)2 + (Market share of firm 3)2 + (Market share of firm 4)2
HHI = (10)2 + (20)2 + (30)2 + (40)2 = 100 + 400 + 900 + 1600 = 3000
The HHI value for this industry is 3000.
If HHI value of an industry exceeds 2,500 then that industry is considered as highly concentrated industry.
So, the industry is considered highly concentrated industry.
Hence, the correct answer is the option (1) [3000; highly concentrated].

