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TOTAL VARIABLE COST AND TOTAL PRODUCT: Because variable cost is largely associated with the cost of employing a variable input in the short run, it's possible to derive the total variable cost curve 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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MARGINAL PROPENSITY TO INVEST The change in business investment expenditures induced by a change in income or production (national income or gross domestic product). The marginal propensity to invest (abbreviated MPI) is another term for the slope of the investment line and is calculated as the change in investment divided by the change in income or production. The MPI plays a role in Keynesian economics. It augments the slope of the aggregate expenditures line and is part to the multiplier process. A related marginal measure is the marginal propensity to consume.
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More money is spent on gardening than on any other hobby.
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"I not only use all the brains that I have, but all that I can borrow. " -- Woodrow Wilson, 28th US president
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SAFEX
South African Futures Exchange
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