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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 SHIFTS Changes in the aggregate supply determinants shift both the short-run aggregate supply curve and the long-run aggregate supply curve. The mechanism is comparable to that for market supply determinants and market supply. There are two options--an increase in aggregate supply and a decrease in aggregate supply. An increase in resource quantity or quality or a decrease in resource price shifts one or both of the aggregate supply curves to right. A decrease in resource quantity or quality or an increase in resource price shifts one or both of the aggregate supply curves to left.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time searching for a specialty store hoping to buy either an instructional DVD on learning to the play the oboe or a small, foam rubber football. Be on the lookout for the happiest person in the room.
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This isn't me! What am I?
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More money is spent on gardening than on any other hobby.
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"I not only use all the brains that I have, but all that I can borrow. " -- Woodrow Wilson, 28th US president
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PBOT
Phildelphia Board of Trade
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