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MARGINAL COST AND DIMINISHING MARGINAL RETURNS: Decreasing then increasing marginal cost that gives rise to a U-shaped marginal cost curve reflects increasing then decreasing marginal returns. In particular the decreasing marginal returns is caused by the law of diminishing marginal returns. As such, the law of diminishing marginal returns affects not only the short-run production of a firm but also the cost of production in the short run.

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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 at a crowded estate auction hoping to buy either a pair of designer sunglasses or looseleaf notebook paper. Be on the lookout for telephone calls from long-lost relatives.
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The earliest known use of paper currency was about 1270 in China during the rule of Kubla Khan.
"He who has a „why¾ to live can bear with almost any „how.""

-- Friedrich Nietzsche, Philosopher

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Journal of Regulatory Economics
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