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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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LABOR

The mental and physical human efforts used in the production of goods and services. This is one of four basic categories of resources, or factors of production. The other three are capital, land, and entrepreneurship.

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APLS

BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time at an auction hoping to buy either throw pillows for your living room sofa or a hepa filter for your furnace. Be on the lookout for pencil sharpeners with an attitude.
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This isn't me! What am I?

There were no banks in colonial America before the U.S. Revolutionary War. Anyone seeking a loan did so from another individual.
"The road to success is always under construction. "

-- Lily Tomlin, Actress

LME
London Metal Exchange
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