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CONCENTRATION RATIOS

A family of measures of the proportion of total output in an industry that is produced by a given number of the largest firms in the industry. The two most common concentration ratios are for the four largest firms and the eight largest firms. The four-firm concentration ratio is the proportion of total output produced by the four largest firms in the industry and the eight-firm concentration ratio is proportion of total output produced by the eight largest firms in the industry. Concentration ratios are commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control of the largest firms in the industry. A related measure is the Herfindahl index.

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BEIGE MUNDORTLE
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Today, you are likely to spend a great deal of time wandering around the shopping mall seeking to buy either a genuine down-filled pillow or one of those "hang in there" kitty cat posters. Be on the lookout for small children selling products door-to-door.
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Francis Bacon (1561-1626), a champion of the scientific method, died when he caught a severe cold while attempting to preserve a chicken by filling it with snow.
"The greater danger for most of us is not that our aim is too high and we miss it, but that it is too low and we reach it."

-- Michelangelo Buonarroti, Painter and Sculptor

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