Concentration Indices

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Concentration indices are useful ways to analyze scenarios which deal with quantitative analysis of the specific subjects be it economic market concentration or health equality analysis. Any concentration index is defined with respect to its concentration curve which usually is two dimensional curve having two coordinates of (x, y) as its main parameters…

Introduction

This index also shows the amount of competition present among the companies. Basically it takes market shares in account and calculates the sum of shares of the market shares of all the companies present in that particular industry. So if there are N firms in an industry, the HHI is calculated as
Where s is the market share of the firm and 'n' represents the number of the firms in the whole industry. If we see a decrease in HHI index we can say that there is an increase in competition and there has been a loss of pricing power and it's vice versa when there is an increase in the value. Other significant variants which typically revolve around the value of HHI are unconcentrated index which is indicated when H index is below 1000. HHI index between 1000 and 1800 indicates moderate concentration value and HHI index above 1800 indicates high concentration
Concentration Ration is defined as the percentage of market share which is owned by N largest firms in an industry. Usually the value of N is 4 but sometimes some other larger number is taken. It is expressed as CRn, so a concentration ration for N largest firms in an industry is defined as follows
Where s defines the market share of the firm and n defines the number of the large firms if the value of the index is near zero then we ...
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