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ECONOMIES OF SCALE: Declining long-run average cost that occurs as a firm increases all inputs and expands its scale of production. This is graphically illustrated by a negatively-sloped long-run average cost curve and typically occurs for relatively small levels of production. Economies of scale are then overwhelmed by diseconomies of scale for relatively large production levels. Together, economies of scale and diseconomies of scale cause the long-run average cost curve to be U-shaped.

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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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[What's This?]

Today, you are likely to spend a great deal of time calling an endless list of 800 numbers wanting to buy either a coffee cup commemorating the 2000 Olympics or a birthday gift for your grandmother. Be on the lookout for jovial bank tellers.
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This isn't me! What am I?

Al Capone's business card said he was a used furniture dealer.
"The marvelous thing about human beings is that we are perpetually reaching for the stars. The more we have, the more we want. And for this reason, we never have it all. "

-- Joyce Brothers, psychologist

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Weak Axiom of Profit Maximization
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