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HIERARCHY OF NEEDS: Developed by Abraham Maslow, the notion that people are motivated to satisfy basic physiological needs (food, shelter, etc.) before moving on to satisfying higher psychological needs (security, companionship, etc.). These alternative needs are layered in a hierarchial pattern with physiological needs on the bottom, safety needs on the second layer, belonging needs on the third layer, esteem needs on the fourth layer, and self-actualization needs at the top. This hierarchy of needs has been used to help explain the progress of human societies from agrarian to manufacturing to service to information.

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MARGINAL UTILITY OF INCOME

The change in utility resulting from a given change in income. This is a specialized case of the general notion of marginal utility, which is simply the change in utility resulting from a given change in the consumption of a good. Marginal utility of income is key to identifying alternative risk preferences, including risk aversion, risk neutrality, and risk loving. These three risk preferences are indicated by three marginal utility of income possibilities, decreasing (risk aversion), increasing (risk loving), and constant (risk neutrality).

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Today, you are likely to spend a great deal of time at the confiscated property police auction seeking to buy either income tax software or a how-to book on the art of negotiation. Be on the lookout for letters from the Internal Revenue Service.
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Cyrus McCormick not only invented the reaper for harvesting grain, he also invented the installment payment for selling his reaper.
"Concentration is the secret of strength in politics, in war, in trade, in short in all management of human affairs. "

-- Ralph Waldo Emerson, philosopher, poet

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