question archive One measure of the extent of competition in an industry is the concentration ratio
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One measure of the extent of competition in an industry is the concentration ratio. What level of concentration indicates that an industry is an oligopoly?
The four-firm concentration ratio:
a. is flawed in that it does not include sales in the U.S. by foreign firms.
b. is accurate because it is based on national and global competition.
c. is flawed in that it includes competition between industries.
d. is accurate because it is based on estimates from the U.S. Census Bureau.
e. Is flawed in that it is calculated for local markets even though competition in some industries is national.
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