An industry which has a 4-firm concentration ratio near 100 would best be described as

Question

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A 4-firm concentration ratio near 100 indicates that the industry is dominated by a small number of large firms, which is characteristic of an oligopoly or a monopoly depending on the size of the biggest firm. It is not perfectly competitive, and it may not necessarily be a clear monopoly unless one of the firms in the market is much larger than the others.

An Industry Which Has a 4-Firm Concentration Ratio near 100