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INJECTION LINE: A line used in the injection-leakage model representing the relation between non-consumption expenditures (that is, injections) and national income. The three injections are investment expenditures, government purchases, and exports. The foundation of the injection line is the investment line, which is then enhanced by adding government purchases and exports. The other part of the injection-leakage model is a line representing leakages. The intersection of the injection and leakage lines identifies equilibrium aggregate output, or Keynesian equilibrium.

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MARGINAL FACTOR COST, MONOPSONY

The change in total factor cost resulting from a change in the quantity of factor input employed by a monopsony. Marginal factor cost, abbreviated MFC, indicates how total factor cost changes with the employment of one more input. It is found by dividing the change in total factor cost by the change in the quantity of input used. Marginal factor cost is compared with marginal revenue product to identify the profit-maximizing quantity of input to hire.

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Today, you are likely to spend a great deal of time wandering around the shopping mall hoping to buy either an extra large beach blanket or a large flower pot shaped like a Greek urn. Be on the lookout for small children selling products door-to-door.
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In the early 1900s around 300 automobile companies operated in the United States.
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