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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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ELASTIC DEMAND The general demand relation in which relatively small changes in price cause relatively large changes in quantity demanded. Small changes in price cause relatively large changes in quantity demanded or the percentage change in quantity demanded is larger than the percentage change in price. This characterization of elasticity is most important for the price elasticity of demand. Elastic demand is one of two general elasticity relations for demand. The other is inelastic demand.
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ORANGE REBELOON
[What's This?]
Today, you are likely to spend a great deal of time at a dollar discount store seeking to buy either a rechargeable battery for your computer or shoe laces for your snow boots. Be on the lookout for fairy dust that tastes like salt.
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The 22.6% decline in stock prices on October 19, 1987 was larger than the infamous 12.8% decline on October 29, 1929.
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"The purpose of learning is growth, and our minds, unlike our bodies, can continue growing as long as we live." -- Mortimer Adler
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S&P 500
Standard&Poor's Stock Index
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