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SEVENTH RULE OF COMPLEXITY: The seventh of seven basic rules of the economy. It is the observation that the world is complex, that every action has direct and often intended consequences and indirect and probably unintended effects (that is, cause and effect). A few of the more noted illustrations of this seventh rule are the circular flow (especially the expenditure multiplier) and market failures (especially externalities).

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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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APLS

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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors trying to buy either pink cotton balls or a genuine down-filled comforter. Be on the lookout for malfunctioning pocket calculators.
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Sixty percent of big-firm executives said the cover letter is as important or more important than the resume itself when you're looking for a new job
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