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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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RESOURCE PRICE, AGGREGATE SUPPLY DETERMINANT

One of three categories of aggregate supply determinants assumed constant when the aggregate supply curve is constructed, and which shifts the aggregate supply curve when it changes. An increase in a resource price causes a decrease (leftward shift) of the short-run aggregate supply curve. A decrease in a resource price causes an increase (rightward shift) of the short-run aggregate supply curve. The other two categories of aggregate supply determinants are resource quantity and resource quality. Specific determinants falling into this general category include wages and energy prices. Anything affecting the prices paid for the use of labor, capital, land, and entrepreneurship is also included.

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Today, you are likely to spend a great deal of time looking for a downtown retail store looking to buy either a green and yellow striped sweater vest or a Boston Red Sox baseball cap. Be on the lookout for vindictive digital clocks with revenge on their minds.
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The first paper notes printed in the United States were in denominations of 1 cent, 5 cents, 25 cents, and 50 cents.
"It is not because things are difficult that we do not dare; it is because we do not dare that they are difficult. "

-- Seneca, statesman, dramatist, philosopher

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