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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 REVENUE PRODUCT CURVE

A curve that graphically illustrates the relation between marginal revenue product and the quantity of the variable input, holding all other inputs fixed. This curve indicates the incremental change in total revenue for incremental changes in the variable input. The marginal revenue product curve plays a key role in marginal productivity theory and the economic analysis of factor markets.

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APLS

BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time at a garage sale trying to buy either a wall poster commemorating last Friday (you know why) or a country wreathe. Be on the lookout for high interest rates.
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A scripophilist is one who collects rare stock and bond certificates, usually from extinct companies.
"I learned about the strength you can get from a close family life. I learned to keep going, even in bad times. I learned not to despair, even when my world was falling apart. I learned that there are no free lunches. And I learned the value of hard work. "

-- Lee Iacocca

WLS
Weighted Least Squares
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