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A market is an oligopoly when a small number of sellers dominate a market or industry. Economists use a set of criteria to determine whether a market form is an oligopoly. These criteria include profit maximization conditions, ability to set price, high barriers to market entry, a small number of firms, long-run abnormal profits, product differentiation, perfect knowledge of cost and demand functions, interdependence on other firms' marketing strategies, and non-price competition.

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10y ago
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10y ago

Economists usually call an industry an oligopoly if the four largest firms produce at least 70-80 percent of the output . You're welcome ~

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Q: How do economist determine whether a market is an oligopoly?
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