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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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OTHER PRICES, SUPPLY DETERMINANT The prices of other goods that influence the decision to sell a particular good, which are assumed constant when a supply curve is constructed. Other prices can be for goods that are either substitutes-in-production or complements-in-production. This is one of five supply determinants that shift the supply curve when they change. The other four are resource prices, production technology, sellers' expectations, and number of sellers.
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GREEN LOGIGUIN
[What's This?]
Today, you are likely to spend a great deal of time wandering around the downtown area looking to buy either a handcrafted bird feeder or a New York Yankees baseball cap. Be on the lookout for celebrities who speak directly to you through your television.
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This isn't me! What am I?
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Helping spur the U.S. industrial revolution, Thomas Edison patented nearly 1300 inventions, 300 of which came out of his Menlo Park "invention factory" during a four-year period.
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"I do the best I know how, the very best I can, and I mean to keep doing so until the end. " -- Abraham Lincoln, 16th US president
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WAPM
Weak Axiom of Profit Maximization
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