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BARRIER TO ENTRY: 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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GOVERNMENT PURCHASES LINE A graphical depiction of the relation between government purchases by the government sector and the economy's aggregate level of income or production. This relation plays a key role in the study of Keynesian economics. A government purchases line is characterized by vertical intercept, which indicates autonomous government purchases, and slope, which is the marginal propensity for government purchases and indicates induced government purchases. The aggregate expenditures line used in Keynesian economics is derived by adding or stacking the government purchases line onto the consumption line, as well as investment expenditures and net exports.
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PINK FADFLY
[What's This?]
Today, you are likely to spend a great deal of time browsing about a thrift store hoping to buy either a solid oak entertainment center or a remote controlled ceiling fan. Be on the lookout for the happiest person in the room.
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One of the largest markets for gold in the United States is the manufacturing of class rings.
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"The shifts of fortune test the reliability of friends. " -- Marcus Tullius Cicero, Roman statesman
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JPE
Journal of Political Economy
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