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CHANGE IN AGGREGATE SUPPLY: A shift of the short-run or long-run aggregate supply curve caused by a change in one of the aggregate supply determinants. In essence, a change in aggregate supply is caused by any factor affecting supply EXCEPT the price level. This concept should be contrasted directly with a change in real production. You might also want to review the terms change in quantity supplied and change in supply, as well. The change in aggregate supply is comparable to the change in market supply. A change in aggregate supply is a change in ALL price level-real production combinations, meaning that each price level is matched up with a different level of real production (which is then illustrated as a shift of the short-run or long-run aggregate supply curve). This change in aggregate supply is caused by a change in any of the aggregate supply determinants. In contrast, a change in real production is a change from one price level-real production combination to the another.
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PERFECT COMPETITION, REALISM Perfect competition is an idealized market structure that does NOT exist in the real world. While some real world industries might come relatively close to one or two of the four key characteristics of perfect competition, none matches all four sufficiently that they can be declared PERFECTLY competitively. Some industries come close on the large number of small firms and the identical product characteristics. A few industries have relatively good, although not perfect, information about prices and technology. However, almost all industries fall far short of the perfect mobility characteristics.
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PINK FADFLY
[What's This?]
Today, you are likely to spend a great deal of time watching infomercials seeking to buy either a how-to book on building remote controlled airplanes or an extra large beach blanket. Be on the lookout for door-to-door salesmen.
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This isn't me! What am I?
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The portrait on the quarter is a more accurate likeness of George Washington than that on the dollar bill.
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"A pint of sweat saves a gallon of blood. " -- General George Patton
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AR
Average Revenue, Autoregressive
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