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HOMOGENEOUS GOOD: Goods that are either physically identical or at least viewed as identical by buyers. In particular, the producer of a good can not be identified from the good itself. This is a key assumption underlying the perfect competition market structure, and like other assumptions is only approximated in the real world. Agricultural products, metals, and energy goods come as close as any in the real world.

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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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Today, you are likely to spend a great deal of time at an auction wanting to buy either a coffee cup commemorating the 1960 Presidential election or a how-to book on fixing your computer, with illustrations. Be on the lookout for telephone calls from former employers.
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Cyrus McCormick not only invented the reaper for harvesting grain, he also invented the installment payment for selling his reaper.
"Plans are only good intentions unless they immediately degenerate into hard work."

-- Peter Drucker, management consultant

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