The following table lists the market shares of the eight firms in an industry.  Market Shares of Eight Firms in an Industry Firm Market Share 1 2424 2 1818 3 1515 4 1212 5 1212 6 88 7 66 8 55 Calculate the four-firm concentration ratio for this industry. Enter your answer in the box below, and round to the nearest whole number if necessary.

Exploring Economics
8th Edition
ISBN:9781544336329
Author:Robert L. Sexton
Publisher:Robert L. Sexton
Chapter15: Oligopoly And Strategic Behavior
Section: Chapter Questions
Problem 13P
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The following table lists the market shares of the eight firms in an industry.
 Market Shares of Eight Firms in an Industry

Firm Market Share
1 2424
2 1818
3 1515
4 1212
5 1212
6 88
7 66
8 55


Calculate the four-firm concentration ratio for this industry. Enter your answer in the box below, and round to the nearest whole number if necessary.

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