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HYPOTHESIS: A reasonable proposition about the workings of the world that's inspired or implied by a theory and which may or may not be true. An hypothesis is essentially a prediction made by a theory that can be compared with observations in the real world. Hypotheses usually take the form: "If A, the also B." The essence of the scientific method is to test, or verify, hypotheses against real world data. If supported by data over and over again, hypotheses become principles.

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DERIVATION, AGGREGATE EXPENDITURES LINE

An aggregate expenditures line, a graphical depiction of the relation between aggregate expenditures and the level of aggregate income or production, can be derived by sequentially adding expenditures by the four macroeconomic sectors (household, business, government, and foreign). This derivation process begins with the consumption line, then adds investment, government purchases, and finally net exports. The process actually generates three alternative aggregate expenditures lines based on the number of sectors included (two sector, three sector, and four sector).

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Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club hoping to buy either a pair of handcrafted oven mitts or a coffee table shaped like the state of Florida. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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Lombard Street is London's equivalent of New York's Wall Street.
"Difficulties mastered are opportunities won. "

-- Winston Churchill, Statesman

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