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ZERO SLOPE: A horizontal line in which the numerical value of the slope, calculated as the change in the variable on the vertical axis divided by a change in the variable on the horizontal axis, is zero. In other words, the Y-axis variable is fixed, or constant, for any and all values of the X-axis variable.

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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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BROWN PRAGMATOX
[What's This?]

Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club wanting to buy either any book written by Isaac Asimov or a how-to book on building remote controlled airplanes. Be on the lookout for defective microphones.
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It's estimated that the U.S. economy has about $20 million of counterfeit currency in circulation, less than 0.001 perecent of the total legal currency.
"There's only one corner of the universe you can be certain of improving and that's your own self. "

-- Aldous Huxley, writer

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National Bureau of Economic Research
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