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PERFECT COMPETITION AND EFFICIENCY: Perfect competition is the idealized market structure that achieves an efficient allocation of resources. The conditions of perfect competition, including (1) 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, ensure that perfect competition efficiently allocates resources. This is in fact the purpose of perfect competition: a market structure that illustrates perfection, the best of all possible resource allocation worlds. The real world falls short of this perfection.

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EIGHT-FIRM CONCENTRATION RATIO

The proportion of total output in an industry produced by the eight largest firms in an industry. This is one of two common concentration ratios. The other is the eight-firm concentration ratio. Another related measure is the Herfindahl index. The eight-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control held by the eight largest firms in the industry.

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BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time going from convenience store to convenience store hoping to buy either a birthday gift for your grandfather or a pleather CD case. Be on the lookout for the last item on a shelf.
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The first U.S. fire insurance company was established by Benjamin Franklin in 1752 in Philadelphia.
"He who has begun has half done. Dare to be wise ‚ begin! "

-- Horace, poet, satirist

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