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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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TOTAL VARIABLE COST AND TOTAL PRODUCT Because variable cost is largely associated with the cost of employing at least one variable input in the short run, the total variable cost curve can be derived from the total product curve. This admittedly simplistic connection between total product and total variable cost is designed to illustrate the fundamental role that the law of diminishing marginal returns plays in the slope and shape of the total variable cost curve. Because he slope of the total variable cost curve, which is also the slope of the total cost curve, is marginal cost, this analysis also indicates how the law of diminishing marginal returns relates to marginal cost.
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John Maynard Keynes was born the same year Karl Marx died.
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"Don't judge each day by the harvest you reap, but by the seeds you plant." -- Robert Louis Stevenson, Author
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AOQL
Average Outgoing Quality Limit
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