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OLIGOPOLY, CONCENTRATION: Oligopoly is a market structure that contains a small number of relatively large firms, meaning oligopoly markets tend to be concentrated. A small number of large firms account for a majority of total output. Concentration unto itself is not necessarily bad, but it often leads to inefficient behavior, such as collusion and nonprice competition. Concentration is measured in three ways--market share, concentration ratio, Herfindahl index.
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PERFECT COMPETITION, LONG-RUN ADJUSTMENT A perfectly competitive industry undertakes a two-part adjustment to equilibrium in the long run. One is the adjustment of each perfectly competitive firm to the appropriate factory size that maximizes long-run profit. The other is the entry of firms into the industry or exit of firms out of the industry, to eliminate economic profit or economic loss. The end result of this long-run adjustment is a multi-faceted equilibrium condition that price is equal to marginal cost and average cost (both short run and long run).
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YELLOW CHIPPEROON
[What's This?]
Today, you are likely to spend a great deal of time searching for a specialty store seeking to buy either a rechargeable battery for your computer or shoe laces for your snow boots. Be on the lookout for deranged pelicans.
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The 1909 Lincoln penny was the first U.S. coin with the likeness of a U.S. President.
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"Executives who get there and stay suggest solutions when they present the problems. " -- Malcolm Forbes, business executive
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JIE
Journal of Industrial Economics
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