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MARGINAL PRODUCT: The change in the quantity of total product resulting from a unit change in a variable input, keeping all other inputs unchanged. Marginal product, usually abbreviated MP, is found by dividing the change in total product by the change in the variable input. Marginal product lies at the very foundation of the analysis of short-run production and the subsequent explanation of the law of supply and the upward-sloping supply curve, using the law of diminishing marginal returns.
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ARC ELASTICITY The average elasticity for discrete changes in two variables. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of initial and ending values of each variable, rather than initial values. Arc elasticity is generally calculated using the midpoint elasticity formula. The contrast to arc elasticity is point elasticity. For infinitesimally small changes in two variables, arc elasticity is the same as point elasticity.
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"Progress begins with the belief that what is necessary is possible. " -- Norman Cousins, editor, writer
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Learning All About EDUCATIONIt's a bright spring morning, the sort of day that makes poets and pedestrians pontificate profusely about our wondrous world. But, wait... IT'S TEST DAY! You're late for an exam! You hurriedly roam the school halls, opening door after endless door along an infinite hallway, in search of your exam. All you discover, though, is Maurice Finklestein who smirks knowingly while ridiculing your tardiness. Why do we do it? Why do we put ourselves through 12 to 20 years of oppression in the halls of academia, learning stuff of questionable value? Why? Why? WHY?
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WHITE GULLIBON
[What's This?]
Today, you are likely to spend a great deal of time at a garage sale trying to buy either a coffee cup commemorating the 1960 Presidential election or a how-to book on fixing your computer, with illustrations. Be on the lookout for fairy dust that tastes like salt.
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The 1909 Lincoln penny was the first U.S. coin with the likeness of a U.S. President.
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BEA
Bureau of Economic Analisys
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