Question

fill in the blank question a market is considered to be a(n) when the largest four firms in an industry control more than 40% or more of the market.

Explanation:

In economics, when the four - firm concentration ratio (the combined market share of the four largest firms in an industry) is 40% or more, the market is considered an oligopoly. An oligopoly is a market structure where a few large firms dominate.

Answer:

oligopoly