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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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AUCTION

A formal market exchange in which prospective buyers make bids to purchase a commodity. An auction is an effective way of exchanging commodities by bringing together buyers and sellers. Auctions are commonly used to exchange financial instruments, agricultural commodities, personal assets, and works of art. Three notable types of auctions are English, Dutch, and sealed-bid.

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BROWN PRAGMATOX
[What's This?]

Today, you are likely to spend a great deal of time wandering around the shopping mall wanting to buy either a weathervane with a cow on top or a box of multi-colored, plastic paper clips. Be on the lookout for jovial bank tellers.
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This isn't me! What am I?

Ragnar Frisch and Jan Tinbergen were the 1st Nobel Prize winners in Economics in 1969.
"Few things can help an individual more than to place responsibility on him, and to let him know that you trust him. "

-- Booker T. Washington, educator

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Securities and Exchange Commision
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