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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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ELASTICITY DETERMINANTS

Three factors that affect the numerical value of the price elasticity of demand and the price elasticity of supply--availability of substitutes, time period of analysis, and proportion of budget. The price elasticities of demand and/or supply for a good can change if these determinants change. The first two determinants are important to both price elasticity of demand and price elasticity of supply, while the third relates specifically to the price elasticity of demand.

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APLS

BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time wandering around the downtown area trying to buy either blue cotton balls or a genuine down-filled pillow. Be on the lookout for small children selling products door-to-door.
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The Dow Jones family of stock market price indexes began with a simple average of 11 stock prices in 1884.
"Everyone is bound to bear patiently the results of his own example. "

-- Phaedrus, Philosopher

WPO
Weakly Pareto Optimal
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