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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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AGGREGATE SUPPLY DETERMINANTS

An assortment of ceteris paribus factors that affect short-run and long-run aggregate supply, but which are assumed constant when the short-run and long-run aggregate supply curves are constructed. Changes in any of the aggregate supply determinants cause the short-run and/or long-run aggregate supply curves to shift. While a wide variety of specific ceteris paribus factors can cause the aggregate supply curves to shift, they are commonly grouped into three broad categories--resource quantity, resource quality, and resource price.

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YELLOW CHIPPEROON
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Today, you are likely to spend a great deal of time at a garage sale trying to buy either a flower arrangement with a lot of roses for your grandmother or a wall poster commemorating the first day of winter. Be on the lookout for small children selling products door-to-door.
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The first paper currency used in North America was pasteboard playing cards "temporarily" authorized as money by the colonial governor of French Canada, awaiting "real money" from France.
"No amount of business school training or work experience can teach what is ultimately a matter of personal character. "

-- Truett Cathy, Chick-fil-A Inc. founder

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