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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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GAME THEORY

An analysis that illustrates how the choices between two players affect the outcomes of a "game." Game theory is commonly used to explain the behavior and decision making of oligopolistic firms. It illustrates that cooperation, rather competition, between two "players" can lead to an outcome that is more beneficial to both players.

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APLS

BEIGE MUNDORTLE
[What's This?]

Today, you are likely to spend a great deal of time at an auction hoping to buy either clothing for your kitty cats or a set of luggage without wheels. Be on the lookout for strangers with large satchels of used undergarments.
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Paper money used by the Commonwealth of Massachusetts prior to the U.S. Revolutionary War, which was issued against the dictates of Britain, was designed by patriot and silversmith, Paul Revere.
"The shifts of fortune test the reliability of friends. "

-- Marcus Tullius Cicero, Roman statesman

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Bank of Japan
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