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ASSUMPTION: An initial condition or statement that sets the stage for an analysis by abstracting from the real world. Assumptions are important to economic theories and economic analysis. Some assumptions are used to simplify a complex analysis into more easily manageable parts. These establish idealistic benchmarks that can be used to evaluate real world conditions. Other assumptions are used as control conditions that are subsequently changed to evaluate the effect of the change. The use of ceteris paribus assumptions in comparative statics analysis is an excellent example.

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AGGREGATE EXPENDITURES LINE

A graphical depiction of the relation between aggregate expenditures by the four macroeconomic sectors (household, business, government, and foreign) and the level of aggregate income or production. In Keynesian economics, the aggregate expenditures line is the essential component of the Keynesian cross analysis used to identify equilibrium income and production. Like any straight line, the aggregate expenditures line is characterized by vertical intercept, which indicates autonomous expenditures, and slope, which indicates induced expenditures. The aggregate expenditures line used in Keynesian economics is derived by adding or stacking investment, government purchases, and net exports to the consumption line.

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BROWN PRAGMATOX
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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 a weathervane with a cow on top or a box of multi-colored, plastic paper clips. Be on the lookout for mail order catalogs with hidden messages.
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Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
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