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AGGREGATE DEMAND CURVE: A graphical representation of the relation between aggregate expenditures on real production and the price level, holding all ceteris paribus aggregate demand determinants constant. The aggregate demand, or AD, curve is one side of the graphical presentation of the aggregate market. The other side is occupied by the aggregate supply curve (which is actually two curves, the long-run aggregate supply curve and the short-run aggregate supply curve). The negative slope of the aggregate demand curve captures the inverse relation between aggregate expenditures on real production and the price level. This negative slope is attributable to the interest-rate effect, real-balance effect, and net-export effect.
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PERFECTLY INELASTIC An elasticity alternative in which changes in one variable (usually price) do NOT cause any changes in another variable (usually quantity). Quantity is totally, completely unresponsive to price. Quantity just does not change, regardless of changes in price. This characterization of elasticity is most important for the price elasticity of demand and the price elasticity of supply. Perfectly inelastic is one of five elasticity alternatives. The other four are perfectly elastic, relatively elastic, relatively inelastic, and unit elastic.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time wandering around the downtown area seeking to buy either a genuine down-filled snow parka or throw pillows for your living room sofa. Be on the lookout for slightly overweight pizza delivery guys.
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Three-forths of the gold mined each year is used to manufacture jewelry.
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"Progress always involves risk. You can't steal second base and keep your foot on first. " -- Frederick B. Wilcox
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JEL
Journal of Economic Literature
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