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MARGINAL FACTOR COST: The change in total factor cost resulting from a change in the quantity of factor input, found by dividing the change in total factor cost by the change in quantity of factor input. Marginal factor cost, abbreviated MFC, indicates how a firm's total factor cost is affected by hiring one more or one fewer worker. Two related concepts are total factor cost and average factor cost.

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DECREASING RETURNS TO SCALE

A given proportional change in all resources in the long run results in a proportional smaller change in production. Decreasing returns to scale exists if a firm increases ALL resources--labor, capital, and other inputs--by a given proportion (say 10 percent) and output increases by less than this proportion (that is, less than 10 percent). This is one of three returns to scale. The other two are increasing returns to scale and constant returns to scale.

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Today, you are likely to spend a great deal of time going from convenience store to convenience store trying to buy either a T-shirt commemorating the 2000 Olympics or a genuine fake plastic Tiffany lamp. Be on the lookout for malfunctioning pocket calculators.
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Cyrus McCormick not only invented the reaper for harvesting grain, he also invented the installment payment for selling his reaper.
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