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INDEX: A measure of the relative average of a group of items compared to a given base value. Index measures are commonly used in economics to combine and compare diverse measures. One common type of index measure is for prices, such as the Consumer Price Index and the Dow Jones Industrial Average of corporate stock prices. Another noted type of index measure is to track macroeconomic activity, especially the index leading economic indicators. Indexes are usually weighted averages rather than simple arithmetic means that are measured relative to a base value or period. The Consumer Price Index, for example, measures the prices of consumer good, weighted by the quantities purchased. The value of a given period is then stated relative to a base year value, which generates a pure, "unitless" number in the range of 100 (give or take).
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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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YELLOW CHIPPEROON
[What's This?]
Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors wanting to buy either an ink cartridge for your printer or a rechargeable battery for your camera. Be on the lookout for malfunctioning pocket calculators.
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Three-forths of the gold mined each year is used to manufacture jewelry.
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"Never let the fear of striking out get in your way. " -- Babe Ruth, baseball player
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IRS
Internal Revenue Service
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