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ENTRY BARRIER: 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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MARKET SUPPLY The combined supply of everyone willing and able to sell a good in a market. Market supply is one half of the market. The other is market demand. It is graphically represented by a positively-sloped market supply curve, which can be derived by combining, or adding, the individual supplies of every seller in the market.
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PINK FADFLY
[What's This?]
Today, you are likely to spend a great deal of time wandering around the shopping mall hoping to buy either a birthday gift for your mother or a weathervane with a horse on top. Be on the lookout for telephone calls from former employers.
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This isn't me! What am I?
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Approximately three-fourths of the U.S. paper currency in circular contains traces of cocaine.
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"There's a very positive relationship between people's ability to accomplish any task and the time they're willing to spend on it." -- Dr. Joyce Brothers
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IIA
Irrelevance of Independent Alternatives
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