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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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TOTAL PRODUCT AND MARGINAL PRODUCT

A mathematical connection between marginal product and total product stating that marginal product IS the slope of the total product curve. If the total product curve has a positive slope (that is, is upward sloping), then marginal product is positive. If the total product curve has a negative slope (downward sloping), then marginal product is negative. If the total product curve has a zero slope (horizontal), then marginal product is zero.

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Today, you are likely to spend a great deal of time driving to a factory outlet trying to buy either an extra large beach blanket or a large flower pot shaped like a Greek urn. Be on the lookout for letters from the Internal Revenue Service.
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The portrait on the quarter is a more accurate likeness of George Washington than that on the dollar bill.
"Carpe diem! Rejoice while you are alive; enjoy the day; live life to the fullest; make the most of what you have. It is later than you think."

-- Horace, Ancient Roman poet

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