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USER CHARGE: A tax that's disguised as a price--a charge for the use of a publicly provided good. Government produces and supplies a number of near-public goods, like education, libraries, parks, and transportation systems. The "prices" for these goods are user charges. The logic is that people who benefit from the good and are willing to pay, should pay for them. While this helps pay production costs, it tends to be inefficient.

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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 waiting for visits from door-to-door solicitors wanting to buy either a small, foam rubber football or an instructional DVD on learning to the play the oboe. Be on the lookout for high interest rates.
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A U.S. dime has 118 groves around its edge, one fewer than a U.S. quarter.
"Everyone is bound to bear patiently the results of his own example. "

-- Phaedrus, Philosopher

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