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PERFECT COMPETITION: An ideal market structure characterized by a large number of small firms, identical products sold by all firms, freedom of entry into and exit out of the industry, and perfect knowledge of prices and technology. This is one of four basic market structures. The other three are monopoly, oligopoly, and monopolistic competition. Perfect competition is an idealized market structure that's not observed in the real world. While unrealistic, it does provide an excellent benchmark that can be used to analyze real world market structures. In particular, perfect competition efficiently allocates resources.

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ABSTRACTION

Simplifying the complexities of the real world by ignoring (hopefully) unimportant details while doing economic analysis. Abstraction is an essential feature of the scientific method. Hypothesis verification, model construction, and comparative static analysis are not possible without abstraction.

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BLUE PLACIDOLA
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Today, you are likely to spend a great deal of time at a garage sale trying to buy either a pair of gray heavy duty boot socks or a 50-foot blue garden hose. Be on the lookout for slightly overweight pizza delivery guys.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
"Whenever you see a successful business, someone once made a courageous decision."

-- Peter F. Drucker, business strategist

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