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ENTRY BARRIERS: Institutional, government, technological, or economic restrictions 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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STANDARD OF DEFERRED PAYMENT

The money function in which money is used as a standard benchmark for specifying future payments for current purchases, that is, buying now and paying later. This function may seem obscure, but it is a direct result of the store of value and unit of account functions. This is one of four basic functions of money. The other three are medium of exchange, unit of account, and store of value.

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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius hoping to buy either a T-shirt commemorating the 2000 Olympics or a genuine fake plastic Tiffany lamp. Be on the lookout for malfunctioning pocket calculators.
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Okun's Law posits that the unemployment rate increases by 1% for every 2% gap between real GDP and full-employment real GDP.
"When the solution is simple, God is answering."

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