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TOTAL VARIABLE COST: Cost of production that changes with changes in the quantity of output produced by a firm in the short run. Total variable cost is one part of total cost. The other is total fixed cost. Variable cost depends on the level of output. If a firm produces more output, then variable cost is greater. If a firm produces no output, then variable cost is zero. A cost measure directly related to total variable cost is average variable cost.

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ADVERSE SELECTION

An inefficient, bad, or adverse outcome of a market exchange that results because buyers and/or sellers make decisions based on asymmetric information. This commonly results in a market that exchanges a lesser quality good, what is termed the market for lemons. Two related problems resulting from asymmetric information are moral hazard and the principal-agent problem. Two methods of lessoning the problem of adverse selection are signalling and screening.

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Today, you are likely to spend a great deal of time flipping through mail order catalogs trying to buy either a New York Yankees baseball cap or a solid oak entertainment center. Be on the lookout for the happiest person in the room.
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The earliest known use of paper currency was about 1270 in China during the rule of Kubla Khan.
"I believe that every right implies a responsibility, every opportunity, an obligation, every possession, a duty. "

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