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EFFICIENT SEARCH, DETERMINANTS: Two factors that affect information search are (1) the amount of purchase and (2) frequency of purchase. Goods that are relatively expensive increase the potential benefit of search. For example, saving 10 percent on the purchase price of a house is significantly more than saving 10 percent on the price of bar of soap. Buyers are thus likely to undertake extensive search when buying a house, but not for soap. Goods that are purchased more frequently also don't require extensive search activities. Since buyers already know the "best places" to buy the "highest quality" products at the "lowest prices" for frequently purchased goods, little can be gained from search.
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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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Cyrus McCormick not only invented the reaper for harvesting grain, he also invented the installment payment for selling his reaper.
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"Be willing to have it so. Acceptance of what has happened is the first step to overcoming the consequences of any misfortune." -- William James, Psychologist
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GARP
Generalized Axioms of Revealed Preference
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