Which of the following four-firm concentration ratios would be the best indicator of a monopoly?
A) 0.25 percent
B) 31 percent
C) 78 percent
D) 100 percent
E) 89 percent

Question

Quizplus · Accepted Answer

A monopoly is defined as having 100 percent market share or control of a specific market. Therefore, a four-firm concentration ratio of 100 percent would be the best indicator of a monopoly.

Which of the Following Four-Firm Concentration Ratios Would Be the Best