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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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MARGINAL UTILITY The additional utility obtained from the consumption or use of an additional unit of a good. It is specified as the change in total utility divided by the change in quantity. Marginal utility indicates what each additional unit of a good is worth to a consumer and provides a theoretical basis for understanding market demand and the law of demand. Marginal utility generally declines with increased consumption of a good, a reflection of the law of diminishing marginal utility.
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WHITE GULLIBON
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Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway hoping to buy either an AC adapter that works with your MPG player or rechargeable batteries. Be on the lookout for defective microphones.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
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"After climbing a great hill, one finds many more hills to climb. " -- Nelson Mandela, president of South Africa
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AEA
American Economic Association
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