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AD CURVE: The aggregate demand curve, which is 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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                           CLASSICAL AGGREGATE SUPPLY CURVE: An aggregate supply curve--a graphical representation of the relation between real production and the price level--that reflects the basic principles of classical economics. The classical aggregate supply curve is vertical at the full-employment level of real production indicating that the quantity of aggregate production is independent of the price level. An alternative is the Keynesian aggregate supply curve. An aggregate supply curve is a graphical representation of the relation between real production and the price level. Classical economics implies that the full-employment level of real production is maintained regardless of the price level, which creates a vertical, or perfectly elastic, aggregate supply curve. This relation results due to flexible prices, which ensure that resources markets maintain equilibrium balance at full employment. Should the price level rise or fall, wages and resource prices adjust to ensure that quantity demanded equals quantity supplied in resource markets.| Classical AS Curve |  |
The exhibit to the right illustrates a classical aggregate supply (AS) curve. The obvious characteristic is that the curve is actually a vertical line. The line is vertical at the full-employment level of real production. Should the price level rise or fall, the economy moves up and down along the curve and real production remains unchanged.The full-employment level of real production corresponds to the natural unemployment rate, also termed the non-accelerating inflation unemployment rate. The measured unemployment rate is not necessarily zero. This rate includes both frictional unemployment and structural unemployment and results if the quantity of labor demanded is equal to the quantity of labor supplied. The classical aggregate supply curve looks a great deal like the long-run aggregate supply curve. Both are vertical at the full-employment level of real production. Both indicate that real production is unaffected by changes in the price level. The reason for the similarity is that the long-run aggregate supply curve is the modern embodiment of the principles of classical economics. For the classical aggregate supply curve, changes in the price level results in changes in wages and resource prices that ensure equality between quantity demanded equals quantity supplied in resource markets. For the long-run aggregate supply curve, changes in the price level results in changes in wages and resource prices that ensure equality between quantity demanded equals quantity supplied in resource markets--in the long run.
Recommended Citation:CLASSICAL AGGREGATE SUPPLY CURVE, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2025. [Accessed: July 6, 2025].
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