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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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SELLERS' MARKET

A disequilibrium condition in a competitive market that has a shortage or excess demand. Because the quantity demanded is greater than the quantity supplied, sellers have the "upper hand" when negotiating. A sellers' market also goes by the more common term of shortage. The alternative to a sellers' market is a buyers' market, which has a surplus or excess supply.

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Today, you are likely to spend a great deal of time at a crowded estate auction seeking to buy either a T-shirt commemorating the 2000 Olympics or a genuine fake plastic Tiffany lamp. Be on the lookout for jovial bank tellers.
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The average bank teller loses about $250 every year.
"Aerodynamically, the bumblebee shouldn't be able to fly, but the bumblebee doesn't know it so it goes on flying anyway. "

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