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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 VARIABLE COST CURVE

A curve that graphically represents the relation between total variable cost incurred by a firm in the short-run production of a good or service and the quantity produced. When constructing this curve, it is assumed that total variable cost changes as a result of changes in the quantity of output produced, while other variables like technology and resource prices are held fixed. The total variable cost curve is one of three total cost curves, the other two are total cost curve and total fixed cost curve.

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RED AGGRESSERINE
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Today, you are likely to spend a great deal of time wandering around the shopping mall hoping to buy either a large red and white striped beach towel or a bottle of blackcherry flavored spring water. Be on the lookout for poorly written technical manuals.
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The portion of aggregate output U.S. citizens pay in taxes (30%) is less than the other six leading industrialized nations -- Britain, Canada, France, Germany, Italy, or Japan.
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-- Benjamin Disraeli, British statesman

IV
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