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ADJUSTMENT, SHORT-RUN AGGREGATE MARKET: Disequilibrium in the short-run aggregate market induces changes in the price level that restore equilibrium. If the price level is above the short-run equilibrium price level, economy-wide product market surpluses cause the price level to fall. If the price level is below the short-run equilibrium price level, economy-wide product market shortages cause the price level to rise. In both cases short-run equilibrium is restored. You might want to compare adjustment, long-run aggregate market. Price level changes induce changes in both aggregate expenditures and real production. Unlike the long-run aggregate market, changes in the price level can induce changes in short-run aggregate supply, making it greater or less than full-employment real production.

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INCOME-EXPENDITURE MODEL: A macroeconomic model, which captures the essence of Keynesian economics, is based on the equality between total income generated from gross domestic product and total expenditures on gross domestic product. The cornerstone of the income-expenditure model is the consumption function, which relates household consumption expenditures to income and gives rise to the aggregate expenditure line with the addition of investment, government purchases, and net exports. The intersection between the aggregate expenditure line at the 45-degree identifies equilibrium.

     See also | Keynesian economics | consumption function | gross domestic product | aggregate expenditures | multiplier | accelerator | unemployment | business cycle | marginal propensity to consume | fiscal policy | Keynesian cross | income-price model | The General Theory |


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SELF CORRECTION, MARKET

The automatic process in which markets adjust from disequilibrium to equilibrium. With this self-correction process, the market price either increases or decreases in response to a shortage or a surplus to restore the balance between quantity demanded and quantity supplied. This process works automatically to achieve equilibrium without the need for outside intervention, such as government regulation.

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