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ABSTRACTION: Simplifying the complexities of the real world by ignoring (hopefully) unimportant details while doing economic analysis. Abstraction is often criticized because it's, well, it's JUST NOT REALISTIC. However, when done correctly (ignoring things that JUST DON'T MATTER), then the pursuit of knowledge is greatly enhanced by abstraction. For example, when travelling cross country along a high-speed interstate highway, a paper road map is a handy tool. It shows towns and cities along the way, the major intersections, rest stop locations, and other important points of interest. However, it ignores unimportant details. It doesn't realistically show the location of every tree, bush, or blade of grass. Why bother? This information won't enhance your road trip.
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SCREENING When confronted by asymmetric information, the use of small bits of information, or indicators, that suggest more comprehensive information. Screening occurs when those with limited information try to identify indicators suggesting more complete information. It is used in markets with adverse selection and moral hazard, especially in labor markets and in the provision of insurance. Common methods of screening include aptitude tests, affiliations, past behavior, and personal characteristics. A related method is signalling.
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WHITE GULLIBON [What's This?]
Today, you are likely to spend a great deal of time wandering around the shopping mall looking to buy either storage boxes for your winter clothes or several magazines on time travel. Be on the lookout for small children selling products door-to-door. Your Complete Scope
This isn't me! What am I?
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A half gallon milk jug holds about $50 in pennies.
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"The man who does not read good books has no advantage over the man who cannot read them. " -- Mark Twain
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NYCE New York Cotton Exchange
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