Choose a good or service that is supplied by a small number of firms (e.g., automobiles). Who are the leading firms and what are their market shares? Compute the concentration ratio and the HHI (show your work in your post).”
The good and service of my choice is automobiles.
The USA automobile industry is dominated by the following six players (including % of market share):
General Motors - 17%
Ford - 14.8%
Toyota - 14%
Chrysler - 12.5%
Nissan - 10%
Honda - 8.9%
The HHi concentration ratio is calculated by taking the sum of squares of market shares of the leading firms in the industry. In this case, the HHI concentration ratio = (0.17)2 + (0.148)2 + (0.14)2 + (0.125)2 + (0.10)2 + (0.089)2 =
0.0289 + 0.021904 + 0.0196 + 0.015625 +0.01 +0.007921 = 0.10
Note: The market share percengatges have been converted into decimal before taking sqares.
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