If some firms in the industry make an economic profit,then
A) the industry cannot be perfectly competitive.
B) the industry must be monopolistically competitive.
C) rival firms will enter if there are no barriers to entry.
D) the firms must practice product differentiation.
E) the industry must be an oligopoly.
Correct Answer:
Verified
Q15: Product differentiation exists within an industry when
A)there
Q16: Monopolistic competition differs from monopoly because in
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Q21: The four-firm concentration ratio is the percentage
Q22: Use the table below to answer the
Q23: In a perfectly competitive market,the Herfindahl-Hirschman Index
Q24: A four-firm concentration ratio that exceeds 60
Q25: An industry with a high four-firm concentration
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