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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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PERFECT COMPETITION, REALISM Perfect competition is an idealized market structure that does NOT exist in the real world. While some real world industries might come relatively close to one or two of the four key characteristics of perfect competition, none matches all four sufficiently that they can be declared PERFECTLY competitively. Some industries come close on the large number of small firms and the identical product characteristics. A few industries have relatively good, although not perfect, information about prices and technology. However, almost all industries fall far short of the perfect mobility characteristics.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius trying to buy either clothing for your pet dog or an ink cartridge for your printer. Be on the lookout for fairy dust that tastes like salt.
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This isn't me! What am I?
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The first U.S. fire insurance company was established by Benjamin Franklin in 1752 in Philadelphia.
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"Our vision controls the way we think and, therefore, the way we act . . . The vision we have of our jobs determines what we do and the opportunities we see or don't see. " -- Charles Koch, executive
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VAR
Vector Autoregression
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