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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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CROSS ELASTICITY OF DEMAND The relative response of a change in the demand for one good to a change in the price of another good. More specifically the cross elasticity of demand is percentage change in the demand for one good due to a percentage change in the price of another good. This notion of elasticity captures the other prices demand determinant. Three other notable elasticities are the price elasticity of demand, the price elasticity of supply, and the income elasticity of demand.
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YELLOW CHIPPEROON
[What's This?]
Today, you are likely to spend a great deal of time at a going out of business sale trying to buy either hand lotion, a big bottle of hand lotion or a lighted magnifying glass. Be on the lookout for slow moving vehicles with darkened windows.
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This isn't me! What am I?
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A U.S. dime has 118 groves around its edge, one fewer than a U.S. quarter.
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"A genius is a talented person who does his homework." -- Thomas Edison
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IBRD
International Bank for Reconstruction and Development
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