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LONG-RUN ADJUSTMENT: The combined adjustment of an industry and of each firm in the industry to an equilibrium condition that based on (1) profit maximization when all inputs are variable and (2) the entry and exit of firms. The complete adjustment is undertaken by both perfect competition and monopolistic competition. There are two parts of this adjustment process. One is the adjustment of each firm to the appropriate factory size that maximizes long-run profit. The other is the entry of firms into the industry or exit of firms out of the industry, to eliminated economic profits or economic losses. The end result of this long-run adjustment is different for the two market structures based on the fact that perfect competition has equality between price and marginal revenue, while monopolistic competition does not.
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HERFINDAHL INDEX A measure of concentration of the production in an industry calculated as the sum of the squares of market shares for each firm. This is one method of summarizing the degree to which an industry is oligopolistic and the concentration of market control held by the largest firms in the industry. Two other measures of industry concentration are the four-firm concentration ratio and the eight-firm concentration ratio.
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RED AGGRESSERINE
[What's This?]
Today, you are likely to spend a great deal of time flipping through the yellow pages trying to buy either a rechargeable flashlight or storage boxes for your computer software CDs. Be on the lookout for telephone calls from long-lost relatives.
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This isn't me! What am I?
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Cyrus McCormick not only invented the reaper for harvesting grain, he also invented the installment payment for selling his reaper.
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"Failure is the opportunity to begin again, more intelligently. " -- Henry Ford, automobile manufacturer
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P&L
Profit and Loss
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