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Subject 4. Aggregate Supply PDF Download
The aggregate quantity of goods and services supplied depends on three factors: labor (L), capital (K), and the state of technology (T).

Y = F (L, K, T)

The aggregate supply curve (AS) represents the relationship between the quantity of goods and services supplied and the price level. It is important to distinguish between long-run aggregate supply and short-run aggregate supply.

The short-run aggregate supply curve typically slopes upward to the right. In the short run, some prices (e.g., rents, wages) are temporarily fixed as the result of prior commitments. Therefore, firms will expand outputs as the price level increases because higher prices will improve profit margins. Short-run equilibrium occurs when the aggregate quantity of goods and services demanded is equal to the aggregate quantity supplied.

The long-run aggregate supply curve is vertical. In the long run, people have sufficient time to alter their behavior to adjust fully to price changes. The sustainable level of output is determined by a nation's resource base, technology, and the efficiency of its institutional factors. The price level has no effect on a nation's long-run aggregate supply. In long-run equilibrium, current output (Yfull) will equal the economy's potential GDP, the economy is operating at full employment, and the actual rate of unemployment will equal the natural rate of unemployment.

Aggregated demand and supply determine the level of real GDP and the price level of a nation.

Learning Outcome Statements

g. explain the aggregate supply curve in the short run and long run;

CFA® 2022 Level I Curriculum, , Volume 2, Reading 10

User Contributed Comments 3

User Comment
jpducros Important to note that Price of output do not impact the LRAS.
jpducros impact meaning shift
Hamad333_1 how can we observe from this LOS that unemployment rate can fall below or rise above the natural unemployment rate ?
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I am using your study notes and I know of at least 5 other friends of mine who used it and passed the exam last Dec. Keep up your great work!


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