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RATIONAL BEHAVIOR: The notion that people make decisions based on the desire to obtain the greatest amount of satisfaction. Rational behavior essential means that people prefer more to less. The presumption of rational behavior underlies most economic analyses, especially those applied to consumer demand theory.

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MARGINAL COST AND LAW OF DIMINISHING MARGINAL RETURNS

Decreasing then increasing marginal cost, reflected by a U-shaped marginal cost curve, is the result of increasing then decreasing marginal returns. In particular the decreasing marginal returns is caused by the law of diminishing marginal returns. As such, the law of diminishing marginal returns affects not only the short-run production of a firm but also the cost of short-run production. This translates into a positively-sloped supply curve for profit-maximizing competitive firms.

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Today, you are likely to spend a great deal of time at the confiscated property police auction trying to buy either car battery jumper cables or a dozen high trajectory optic orange golf balls. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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Parker Brothers, the folks who produce the Monopoly board game, prints more Monopoly money each year than real currency printed by the U.S. government.
"The work of the individual still remains the spark that moves mankind forward. "

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