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ABILITY-TO-PAY PRINCIPLE: A principle of taxation in which taxes are based on the income or resource-ownership ability of people to pay the tax. The income tax collected by our friends at the Internal Revenue Service is one of the most common taxes that seeks to abide by the ability-to-pay principle. In theory, the income tax system is set up such that people with greater incomes pay more taxes. Proportional and progressive taxes follow this ability-to-pay principle, while regressive taxes, such as sales taxes and Social Security taxes, don't.

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MARGINAL FACTOR COST, PERFECT COMPETITION

The change in total factor cost resulting from a change in the quantity of factor input employed by a perfectly competitive firm. 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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APLS

RED AGGRESSERINE
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Today, you are likely to spend a great deal of time at an auction trying to buy either shoe laces for your snow boots or a rim for your spare tire. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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There were no banks in colonial America before the U.S. Revolutionary War. Anyone seeking a loan did so from another individual.
"To understand a man, you must know his memories. The same is true of a nation."

-- Anthony Quayle, Actor

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Generalized Axioms of Revealed Preference
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