Question

multiple choice question
for an industry to be considered an oligopoly the four - firm concentration ratio must be

greater than or equal to 50%
less than or equal to 40%
greater than or equal to 40%
greater than or equal to 60%

Explanation:

The four - firm concentration ratio measures the market share of the four largest firms in an industry. In an oligopoly, a few firms dominate the market. A common rule - of - thumb is that for an industry to be considered an oligopoly, the four - firm concentration ratio should be greater than or equal to 40%.

Answer:

C. greater than or equal to 40%