Multiple Choice
If there are 500 firms in an industry, and the four-firm concentration ratio is 90 percent, then
A) 496 firms account for the remaining 10 percent of sales
B) the industry must be monopolistic competition
C) the 4 firms each have 90 percent market share
D) the top four firms are a monopoly
E) the leading four firms receive 10 percent of industry profit
Correct Answer:
Verified
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