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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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DEMAND DECREASE

A decrease in the willingness and ability of buyers to purchase a good at the existing price, illustrated by a leftward shift of the demand curve. A decrease in demand is caused by a change in a demand determinant and results in a decrease in equilibrium quantity and a decrease in equilibrium price. A demand decrease is one of two demand shocks to the market. The other is a demand increase.

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YELLOW CHIPPEROON
[What's This?]

Today, you are likely to spend a great deal of time wandering around the downtown area wanting to buy either a coffee cup commemorating last Friday (you know why) or a wall poster commemorating the first day of spring. Be on the lookout for infected paper cuts.
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This isn't me! What am I?

Parker Brothers, the folks who produce the Monopoly board game, prints more Monopoly money each year than real currency printed by the U.S. government.
"Whenever you fall, pick up something. "

-- Oswald Avery, scientist

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Supply and Demand
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