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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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An asset or item voluntarily exchanged in a market transaction for another asset or item. This item or asset is usually, but not necessarily, money. A barter transaction occurs if money is NOT one of the assets or items exchanged. In a standard market diagram, price is displayed on the vertical axis.

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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius trying to buy either a handcrafted spice rack or a cell phone case. Be on the lookout for gnomes hiding in cypress trees.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
"When we do the best we can, we never know what miracle is wrought in our life or in the life of another. "

-- Helen Keller, lecturer, author

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