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INJECTION: A non-consumption expenditure on gross domestic product, including investment expenditures, government purchases, and exports. Injections are combined with leakages in the injection-leakage model used to identify equilibrium aggregate output in Keynesian economics. The notion of injection is best viewed through the circular flow, in which investment expenditures, government purchases, and exports are "injected" into the main flow between output, factor payments, national income, and consumption.
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MARGINAL REVENUE, MONOPOLY The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a monopoly receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a monopoly equates marginal revenue and marginal cost.
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The 1909 Lincoln penny was the first U.S. coin with the likeness of a U.S. President.
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"Always remember that striving and struggle precede success, even in the dictionary. " -- Sarah Ban Breathnach, writer
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ACBS
Accrediting Commission for Business Schools
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