Question

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?
Most economists believe that a​ four-firm concentration ratio of __________ (less / greater than) than __________ percent indicates that an industry is an oligopoly. ​(Enter your response as an​ integer.)

Answer 1

Answer: greater, 40%

Explanation: Most economist believe that a four firm concentration ratio is "greater" than "40%" indicate that an oligopoly.

Concentration ratio is simply the ratio of the combination of market shares of a specific numbers of firm to the size of a market. Three-firm, four-firm and five-firm concentration ratio are the most common to considered.