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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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SUPPLY-DRIVEN BUSINESS CYCLES

Business-cycle instability caused by changes in one or more of the determinants underlying the aggregate supply of gross domestic product--including resource quantity, resource quality, and resource price. This is one of two basic types of business cycles--the other being demand-driven business cycles. Supply-driven business cycles tend to be the less common of the two types.

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Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club trying to buy either an ink cartridge for your printer or a rechargeable battery for your camera. Be on the lookout for bottles of barbeque sauce that act TOO innocent.
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The 22.6% decline in stock prices on October 19, 1987 was larger than the infamous 12.8% decline on October 29, 1929.
"I can feel guilty about the past, apprehensive about the future, but only in the present can I act."

-- Abraham Maslow, Psychologist

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