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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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ELASTICITY ALTERNATIVES, DEMAND Five categories of the price elasticity of demand that reflect the entire range of the relative responsiveness of a change in quantity demanded to a change in price. These five alternatives--perfectly elastic, relatively elastic, unit elastic, relatively inelastic, and perfectly inelastic--are often illustrated by different demand curves. The price elasticity of supply is also reflected by five comparable alternatives.
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ORANGE REBELOON
[What's This?]
Today, you are likely to spend a great deal of time watching the shopping channel trying to buy either a case for your designer sunglasses or arch supports for your shoes. Be on the lookout for broken fingernail clippers.
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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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"He who hesitates is poor. " -- Mel Brooks, writer, director, comedian
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Income
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