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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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AVERAGE TOTAL COST

Total cost per unit of output, found by dividing total cost by the quantity of output. When compared with price (per unit revenue), average total cost (ATC) indicates the per unit profitability of a profit-maximizing firm. Average total cost is one of three average cost concepts important to short-run production analysis. The other two are average fixed cost and average variable cost. A related concept is marginal cost.

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APLS

ORANGE REBELOON
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Today, you are likely to spend a great deal of time browsing through a long list of dot com websites wanting to buy either a birthday gift for your grandfather or a pleather CD case. Be on the lookout for fairy dust that tastes like salt.
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One of the largest markets for gold in the United States is the manufacturing of class rings.
"Enthusiasm is the greatest asset in the world. It beats money and power and influence. It is no more or less than faith in action. "

-- Henry Chester, Writer

BPEA
Brookings Papers on Economic Activity
A PEDestrian's Guide
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