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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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FIFTH RULE OF IMPERFECTION The fifth of seven basic rules of the economy, stating that the real world is not perfect, especially in terms of achieving an efficient allocation of resources. This rule means that markets often fail to achieve due to market failures, and that governments seldom satisfactorily enact the policies needed to correct market failings. As such, the real world is often faced with the lesser of two evils--imperfect markets or imperfect government.
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ORANGE REBELOON
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Today, you are likely to spend a great deal of time strolling through a department store seeking to buy either a replacement battery for your pocket calculator or a how-to book on home remodeling. Be on the lookout for neighborhood pets, especially belligerent parrots.
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In the late 1800s and early 1900s, almost 2 million children were employed as factory workers.
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"I was always looking outside myself for strength and confidence, but it comes from within. It is there all the time. " -- Anna Freud, psychologist
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