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ENTRY BARRIER: An institutional, government, technological, or economic restriction on the entry of firms into a market or industry. The four primary barriers to entry are: resource ownership, patents and copyrights, government restrictions, and start-up costs. Barriers to entry are a key reason for market control and the inefficiency that this generates. In particular, monopoly, oligopoly, monopsony, and oligopsony often owe their market control to assorted barriers to entry. By way of contrast, perfect competition, monopolistic competition, and monopsonistic competition have few if any barriers to entry and thus little or no market control.
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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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BLUE PLACIDOLA
[What's This?]
Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius seeking to buy either a birthday greeting card for your uncle or a T-shirt commemorating the 2000 Presidential election. Be on the lookout for crowded shopping malls.
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This isn't me! What am I?
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Mark Twain said "I wonder how much it would take to buy soap buble if there was only one in the world."
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"In a restless, creative business with an emphasis on experiment and development, ideas are the lifeblood." -- Richard Branson, Virgin Group founder
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AIC
Akaike's Information Criterion
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