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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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EIGHT-FIRM CONCENTRATION RATIO The proportion of total output in an industry produced by the eight largest firms in an industry. This is one of two common concentration ratios. The other is the eight-firm concentration ratio. Another related measure is the Herfindahl index. The eight-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control held by the eight largest firms in the industry.
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GRAY SKITTERY
[What's This?]
Today, you are likely to spend a great deal of time wandering around the downtown area hoping to buy either a birthday gift for your uncle or a pair of red and purple designer socks. Be on the lookout for defective microphones.
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General Electric is the only stock from the original 1896 Dow Jones Industrial Average remaining in the current index.
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"Trust yourself. You know more than you think you do. " -- Benjamin Spock, doctor
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Exports;Marks the Spot
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