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AGGREGATE EXPENDITURE DETERMINANT: A ceteris paribus factor that affects aggregate expenditures, but which is 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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APLS

BROWN PRAGMATOX
[What's This?]

Today, you are likely to spend a great deal of time searching the newspaper want ads hoping to buy either any book written by Stephan King or a T-shirt commemorating next Thursday. Be on the lookout for letters from the Internal Revenue Service.
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This isn't me! What am I?

The standard "debt" notation I.O.U. does not mean "I owe you," but actually stands for "I owe unto..."
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