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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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PHENOMENON

An event or action that is subject to investigation, analysis, and explanation using the scientific method. Phenomena are the sorts of things that science seeks to explain. They can be common events, like the blowing wind, or unusual, like the extinction of the dinosaurs.

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PURPLE SMARPHIN
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Today, you are likely to spend a great deal of time surfing the Internet looking to buy either a birthday gift for your aunt or a pair of leather sandals that won't cause blisters. Be on the lookout for deranged pelicans.
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Approximately three-fourths of the U.S. paper currency in circular contains traces of cocaine.
"Nothing great has ever been achieved except by those who dared believe that something inside them was superior to circumstances. "

-- Bruce Barton, Advertising executive

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