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PLANNING CURVE: Another term for the long-run average cost curve (LRAC). Using the name planning curve indicates that the long-run average cost curve is used to "making plans" especially concerning the desired scale of operations of a firm. That is, in the long run a firm will seek the plant size that maximizes long-run profit by equating long-run marginal cost and marginal revenue. It will then pick out the appropriate plant size off the long-run average cost with the minimum short-run average total cost.

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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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Today, you are likely to spend a great deal of time at the confiscated property police auction trying to buy either a birthday greeting card for your uncle or a T-shirt commemorating the 2000 Presidential election. Be on the lookout for celebrities who speak directly to you through your television.
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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.
"My motto was always to keep swinging. Whether I was in a slump or feeling badly or having trouble off the field, the only thing to do was keep swinging. "

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