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LRAC CURVE: The common abbreviation for the long-run average cost curve, which is 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 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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AVERAGE FACTOR COST CURVE, PERFECT COMPETITION A curve that graphically represents the relation between average factor cost incurred by a perfectly competitive firm for employing an input and the quantity of input used. Because average factor cost is essentially the price of the input, the average factor cost curve is also the supply curve for the input. The average factor cost curve for a perfectly competitive firm with no market control is horizontal. The average revenue curve for a firm with market control is positively sloped.
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WHITE GULLIBON
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Today, you are likely to spend a great deal of time strolling through a department store trying to buy either an AC adapter that won't fry your computer or a case for your designer sunglasses. Be on the lookout for the happiest person in the room.
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Mark Twain said "I wonder how much it would take to buy soap buble if there was only one in the world."
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"Don't be afraid if things seem difficult in the beginning. That's only the initial impression. The important thing is not to retreat; you have to master yourself." -- Olga Korbut, Gymnast
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OFT
Office of Fair Trading (UK)
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