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October 16, 2018 

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SLOPE, PRODUCTION POSSIBILITIES CURVE: The numerical value of the slope of the production possibilities curve is the opportunity cost of producing the good measured on the horizontal axis.

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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.

     See also | aggregate expenditures | gross domestic product | Keynesian cross | consumption expenditures | investment expenditures | government purchases | net exports | consumption line | marginal propensity to consume | marginal propensity to invest | marginal propensity for government purchases | marginal propensity to import | 45-degree line | Keynesian economics | aggregate demand |


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AGGREGATE EXPENDITURE LINE, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2018. [Accessed: October 16, 2018].


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MARGINAL COST AND LAW OF DIMINISHING MARGINAL RETURNS

Decreasing then increasing marginal cost, reflected by a U-shaped marginal cost curve, is the result of increasing then decreasing marginal returns. In particular the decreasing marginal returns is caused by the law of diminishing marginal returns. As such, the law of diminishing marginal returns affects not only the short-run production of a firm but also the cost of short-run production. This translates into a positively-sloped supply curve for profit-maximizing competitive firms.

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Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club wanting to buy either a package of blank rewritable CDs or yellow cotton balls. Be on the lookout for the happiest person in the room.
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A U.S. dime has 118 groves around its edge, one fewer than a U.S. quarter.
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