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AGGREGATE EXPENDITURE DETERMINANTS: An assortment of ceteris paribus factors that affect aggregate expenditures, but which are assumed constant when the aggregate expenditure line is constructed. Changes in any of the aggregate expenditures determinants cause the aggregate expenditure line to shift. While a wide variety of specific ceteris paribus factors can cause the aggregate expenditure line to shift, it's usually most convenient to group them into the four, broad expenditure categories -- consumption, investment, government purchases, and net exports. The reason is that changes in these expenditures are the direct cause of shifts in the aggregate expenditure line. If any determinant affects aggregate expenditures it MUST affect one of these four expenditures.
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ABSTRACTION Simplifying the complexities of the real world by ignoring (hopefully) unimportant details while doing economic analysis. Abstraction is an essential feature of the scientific method. Hypothesis verification, model construction, and comparative static analysis are not possible without abstraction.
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RED AGGRESSERINE
[What's This?]
Today, you are likely to spend a great deal of time searching the newspaper want ads wanting to buy either a weathervane with a horse on top or a case of blank recordable DVDs. Be on the lookout for rusty deck screws.
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The average length of a "business lunch" is about 36 minutes.
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"As the births of living creatures at first are ill-shapen, so are all innovations, which are the births of time. " -- Sir Francis Bacon, philosopher
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MRS
Marginal Rate of Substitution
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