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LONG-RUN AVERAGE COST CURVE: A curve depicting the per unit cost of producing a good or service in the long run when all inputs are variable. The long-run average cost curve (usually abbreviated LRAC) can be derived in two ways. On is to plot long-run average cost, which is, long-run total cost divided by the quantity of output produced. at different output levels. The more common method, however, is as an envelope of an infinite number of short-run average total cost curves. Such an envelope is base on identifying the point on each short-run average total cost curve that provides the lowest possible average cost for each quantity of output. The long-run average cost curve is U-shaped, reflecting economies of scale (or increasing returns to scale) when negatively-sloped and diseconomies of scale (or decreasing returns to scale) when positively sloped. The minimum point (or range) on the LRAC curve is the minimum efficient scale.
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MARGINAL REVENUE CURVE, MONOPOLISTIC COMPETITION A curve that graphically represents the relation between the marginal revenue received by a monopolistically competitive firm for selling its output and the quantity of output sold. Because a monopolistically competitive firm is a price maker and faces a negatively-sloped demand curve, its marginal revenue curve is also negatively sloped and lies below its average revenue (and demand) curve. A monopolistically competitive firm maximizes profit by producing the quantity of output found at the intersection of the marginal revenue curve and marginal cost curve.
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GREEN LOGIGUIN
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Today, you are likely to spend a great deal of time searching for rummage sales wanting to buy either a coffee table shaped like the state of Florida or storage boxes for your summer clothes. Be on the lookout for mail order catalogs with hidden messages.
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A communal society, a prime component of Karl Marx's communist philosophy, was advocated by the Greek philosophy Plato.
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"The past is a foreign country; they do things differently there." -- Leslie Poles Hartley, Writer
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WFTU
World Federation of Trade Unions
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