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THREE-SECTOR INJECTIONS-LEAKAGES MODEL: A model used to identify equilibrium in Keynesian economics based on injections (investment and government purchases) and leakages (saving and taxes) for the three domestic sectors (household, business, and government). Equilibrium is achieved at the intersection of the saving and tax line, S + T, and the investment and government purchases line, I + G.

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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 browsing through a long list of dot com websites wanting to buy either an ink cartridge for your printer or a rechargeable battery for your camera. Be on the lookout for cardboard boxes.
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A U.S. dime has 118 groves around its edge, one fewer than a U.S. quarter.
"Most human beings have an almost infinite capacity for taking things for granted. "

-- Aldous Huxley, writer

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