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ADJUSTMENT, LONG-RUN AGGREGATE MARKET: Disequilibrium in the long-run aggregate market induces changes in the price level that restore equilibrium. If the price level is above the long-run equilibrium price level, economy-wide product market surpluses cause the price level to fall. If the price level is below the long-run equilibrium price level, economy-wide product market shortages cause the price level to rise. In both cases long-run equilibrium is restored. Price level changes induce changes in aggregate expenditures but NOT changes in real production. The reason is that long-run aggregate supply is full-employment real production, which is unaffected by the price level.

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KEYNESIAN AGGREGATE EXPENDITURE MODEL: The generic term for several graphical models used to analysis the basic components of Keynesian economics and to identify Keynesian equilibrium as the intersection of the aggregate expenditures line and the 45-degree line. Differences among the specific models are based on which sectors are included (household, business, government, and foreign) and whether expenditures are induced or autonomous.

     See also | Keynesian economics | Keynesian equilibrium | consumption line | aggregate expenditures line | 45-degree line | household sector | business sector | government sector | foreign sector | two-sector Keynesian model | three-sector Keynesian model | four-sector Keynesian model |


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AGGREGATE EXPENDITURES

The total expenditures on gross domestic product undertaken in a given time period by the four sectors--household, business, government, and foreign. Expenditures made by each of these sectors are commonly termed consumption expenditures, investment expenditures, government purchases, and net exports. Aggregate expenditures (AE) are a cornerstone in the study of macroeconomics, playing critical roles in Keynesian economics, aggregate market analysis, and to a lesser degree, monetarism. In particular, aggregate expenditures are combined with the price level as aggregate demand.

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