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REALISM OF PERFECT COMPETITION: 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 a one or two of the four key characteristics of perfect competition, none matches all four sufficiently that we can declare a perfectly competitively industry. 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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AGGREGATE EXPENDITURES EQUATION An equation that summarizes the four aggregate expenditures on gross domestic product by the four macroeconomic sectors. In the study of Keynesian economics, this equation is commonly used to summarize the demand side of the macroeconomy. The aggregate expenditures equation actually comes in three different versions depending on how many of the four sectors and their expenditures are included.
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YELLOW CHIPPEROON
[What's This?]
Today, you are likely to spend a great deal of time at a crowded estate auction looking to buy either a video game player or an AC adapter that won't fry your computer. Be on the lookout for the last item on a shelf.
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Much of the $15 million used by the United States to finance the Louisiana Purchase from France was borrowed from European banks.
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"Opportunities are usually disguised as hard work, so most people don't recognize them." -- Ann Landers, columnist
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CES
Constant Elasticity of Substitution
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