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LONG-RUN MARGINAL COST: The change in the long-run total cost of producing a good or service resulting from a change in the quantity of output produced. Like all marginals, long-run marginal cost is the increment in the corresponding total. What's most notable about long-run marginal cost, however, is that we are operating in the long run. Unlike the short run, in which at least one input is fixed, there are no fixed inputs in the long run. As such, there is only variable cost. This means that long-run marginal cost is the result of changes in the cost of all inputs.
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EIGHT-FIRM CONCENTRATION RATIO The proportion of total output in an industry produced by the eight largest firms in an industry. This is one of two common concentration ratios. The other is the eight-firm concentration ratio. Another related measure is the Herfindahl index. The eight-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control held by the eight largest firms in the industry.
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GREEN LOGIGUIN
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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius seeking to buy either an AC adapter for your CD player or storage boxes for your family photos. Be on the lookout for neighborhood pets, especially belligerent parrots.
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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.
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"We may affirm absolutely that nothing great in the world has been accomplished without passion." -- Hegel
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PWAC
Present Worth of Annual Costs
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