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MARGINAL TAX RATE: A tax rate that is the percentage of an incremental change in the tax base paid in taxes. Comparable to any marginal, this is the change in total taxes collected or paid divided by the change in the total value of the tax base. For example, if a person has a $10,000 increase in earnings from $40,000 to $50,000 and income taxes increase by $2,000 from $3,000 to $5,000 in taxes, then the marginal income tax rate is 20 percent. The contrasting term is average tax rate.

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TOTAL VARIABLE COST

Cost of production that does change with changes in the quantity of output produced by a firm in the short run. Total variable cost is one part of total cost. The other is total fixed cost. Variable cost depends on the level of output. If a firm produces more output, then variable cost is greater. If a firm produces no output, then variable cost is zero. A cost measure directly related to total variable cost is average variable cost.

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Today, you are likely to spend a great deal of time flipping through mail order catalogs wanting to buy either a birthday greeting card for your uncle or a T-shirt commemorating the 2000 Presidential election. Be on the lookout for poorly written technical manuals.
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CPI-U
Consumer Price Index-All Urban Consumers
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