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MARGINAL FACTOR COST AND AVERAGE FACTOR COST: The relation between marginal factor cost and average factor cost is comparable to other average-marginal relations found in the study of economics. For a firm that hires factors in a perfectly competitive factor market, marginal factor cost and average factor cost are equal, and equal to the factor market price. All three are represented by a horizontal, or perfectly elastic, curve equal to the factor market price. For a firm that hires factors in an imperfectly competitive factor market, especially monopsony, marginal factor cost is greater than both average factor cost and the factor market price.

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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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Today, you are likely to spend a great deal of time watching infomercials seeking to buy either a decorative windchime with plastic or a flower arrangement for that special day for your mother. Be on the lookout for malfunctioning pocket calculators.
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Ragnar Frisch and Jan Tinbergen were the 1st Nobel Prize winners in Economics in 1969.
"Something in human nature causes us to start slacking off at our moment of greatest accomplishment. As you become successful, you will need a great deal of self-discipline not to lose your sense of balance, humility and commitment."

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