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GDI: The abbreviation for gross domestic income, which is the total market value of all final goods and services produced within the political boundaries of an economy during a given period of time, usually a year, as calculated using the income approach to measuring gross domestic product. Gross domestic income is virtually identical to gross domestic product (GDP), with one minor difference, the statistical discrepancy. As a matter of fact, the statistical discrepancy is identified as the difference between GDP and GDI.

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MARGINAL COST

The change in total cost (or total variable cost) resulting from a change in the quantity of output produced by a firm in the short run. Marginal cost (MC) indicates how much total cost changes for a given change in the quantity of output. Because changes in total cost are matched by changes in total variable cost in the short run (total fixed cost is fixed), marginal cost is the change in either total cost or total variable cost. It is found by dividing the change in total cost (or total variable cost) by the change in output. Marginal cost is one of four cost concepts used in short-run production analysis. The other three are average total cost, average fixed cost, and average variable cost.

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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers seeking to buy either several magazines on computer software or a T-shirt commemorating the second moon landing. Be on the lookout for telephone calls from long-lost relatives.
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A U.S. dime has 118 groves around its edge, one fewer than a U.S. quarter.
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-- Aristotle

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