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EIGHT-FIRM CONCENTRATION RATIO: The proportion of total output in an industry that's produced by the eight largest firms in the industry. This is one of two common concentration ratios. The other is the four-firm concentration ratio. The eight-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and how market control is held by the eight largest firms in the industry.

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AVERAGE VARIABLE COST CURVE

A curve that graphically represents the relation between average variable cost incurred by a firm in the short-run product of a good or service and the quantity produced. This curve is constructed to capture the relation between average variable cost and the level of output, holding other variables, like technology and resource prices, constant. The average variable cost curve is one of three average curves. The other two are average total cost curve and average fixed cost curve. A related curve is the marginal cost curve.

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Today, you are likely to spend a great deal of time at a dollar discount store trying to buy either income tax software or a how-to book on the art of negotiation. Be on the lookout for the last item on a shelf.
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Approximately three-fourths of the U.S. paper currency in circular contains traces of cocaine.
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