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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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CIRCULAR FLOW A model of the continuous movement of production, income, and the services of scarce resources that flow between producers and consumers. In particular, the circular flow is a model of the continuous production and consumption interaction among the four major sectors of the macroeconomy--household, business, government, and foreign--using the three macroeconomic markets--product, resource, and financial. The circular flow model provides a easy way of getting the "big picture" and of seeing how the key parts of the macroeconomy fit together.
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BLUE PLACIDOLA
[What's This?]
Today, you are likely to spend a great deal of time surfing the Internet hoping to buy either a lazy Susan for you dining room table or a set of serrated steak knives, with durable plastic handles. Be on the lookout for door-to-door salesmen.
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The first "Black Friday" on record, a friday marked by a major financial catastrophe, occurred on September 24, 1869 -- A FRIDAY -- when an attempted cornering of the gold market induced a financial crises and economy-wide depression.
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"Difficulty is the excuse history never accepts. " -- Edward R. Murrow, News broadcaster
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EJ
Economic Journal
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