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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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AXIOM

A basic precondition or assumption underlying a theory. Axioms are basic, unverifiable world view assumptions--including personal beliefs, political views, and cultural values--that form the foundation of a theory.

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BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time surfing the Internet hoping to buy either a rechargeable battery for your camera or a coffee cup commemorating the first day of spring. Be on the lookout for rusty deck screws.
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Al Capone's business card said he was a used furniture dealer.
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