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IMPERFECT COMPETITION: Any markets or industries that do not match the criteria for perfect competition. The key characteristics of perfect competition are: (1) a large number of small firms, (2) identical products sold by all firms, (3) freedom of entry into and exit out of the industry, and (4) perfect knowledge of prices and technology. These four characteristics are essentially impossible to match in the real world.

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COMMON-PROPERTY GOODS

Goods characterized by rival consumption and the inability to exclude nonpayers. Common-property goods are one of four types of goods differentiated by consumption rivalry and nonpayer excludability. The other three goods are private (rival consumption and nonpayers can be excluded), public (nonrival consumption and nonpayers cannot be excluded), and near-public (nonrival consumption and nonpayers can be excluded). Nonrival consumption and the ease of excluding of nonpayers means common-property goods cannot be efficiently exchanged through markets and are often overconsumed.

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APLS

BEIGE MUNDORTLE
[What's This?]

Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius wanting to buy either a package of blank rewritable CDs or yellow cotton balls. Be on the lookout for door-to-door salesmen.
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Approximately three-fourths of the U.S. paper currency in circular contains traces of cocaine.
"There are no shortcuts to any place worth going. "

-- Beverly Sills, Opera singer

NLREG
Nonlinear Statistical Regression
A PEDestrian's Guide
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