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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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IMPLICIT COST

An opportunity cost that does not involve a monetary payment or any other form of compensation. The monetary payment that is often made to compensate the person who initially foregoes the satisfaction is not made for implicit cost. There is no payment to transfer the burden of the opportunity cost from the original person to someone else. Implicit cost is also occasionally termed implicit opportunity cost.

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Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club looking to buy either a how-to book on home repairs or a large, stuffed kitty cat. Be on the lookout for defective microphones.
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Two and a half gallons of oil are needed to produce one automobile tire.
"An organization's ability to learn, and translate that learning into action rapidly, is the ultimate competitive business advantage. "

-- Jack Welch, General Electric chief executive

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