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AGGREGATE EXPENDITURE LINE: A line representing the relation between aggregate expenditures and gross domestic product used in the Keynesian cross. The aggregate expenditure line is obtained by adding investment expenditures, government purchases, and net exports to the consumption line. As such, the slope of the aggregate expenditure line is largely based on the slope of the consumption line (which is the marginal propensity to consume), with adjustments coming from the marginal propensity to invest, the marginal propensity for government purchases, and the marginal propensity to import. The intersection of the aggregate expenditures line and the 45-degree line identifies the equilibrium level of output in the Keynesian cross.

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Lesson 1: Economic Basics | Unit 5: Policies Page: 15 of 18

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Markets do a reasonable, but not make perfect, job of pursuing the five economic goals.

Market Imperfections:

  • Instability: Markets can cause instability in the macroeconomy, preventing growth, stability, and full employment.
  • Inefficiency: Market imperfections can prevent the economy from efficiently using resources.
  • Equity: The market generated distribution of income and wealth might not be desired by society.

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SHORT-RUN AGGREGATE SUPPLY CURVE

A graphical representation of the short-run relation between real production and the price level, holding all ceteris paribus aggregate supply determinants constant. The short-run aggregate supply, or SRAS, curve is one of two curves that graphical capture the supply-side of the aggregate market. The other is the long-run aggregate supply curve (LRAS). The demand-side of the aggregate market is occupied by the aggregate demand curve. The positive slope of the SRAS curve captures the direct relation between real production and the price level that exists in the short run.

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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors wanting to buy either yellow cotton balls or a set of steel-belted radial snow tires. Be on the lookout for the happiest person in the room.
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One of the largest markets for gold in the United States is the manufacturing of class rings.
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