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SOCIAL SECURITY TAX: A tax on wage earnings that's used to fund the Social Security system. In principle, the Social Security tax is divided equally between employer and employee--your share is listed under the FICA heading of your paycheck. In practice, however, employees really end up paying both employee and employer contributes. The reason is that employers need to consider the entire cost of hiring an employee, including wages, fringe benefits, and assorted taxes. The more they pay in these nonwage items, like Social Security taxes, the less they pay in wages. In that the Social security tax is only on earnings, and excludes profit, interest, and rent, it tends to be a regressive tax.

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MARGINAL PHYSICAL PRODUCT

The change in the quantity of total physical product resulting from a unit change in a variable input, keeping all other inputs unchanged. Marginal physical product, usually abbreviated MPP, is found by dividing the change in total physical product by the change in the variable input. Marginal physical product, which more often goes by the name marginal product (MP), is one of two measures derived from total physical product. The other is average physical product.

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APLS

BROWN PRAGMATOX
[What's This?]

Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway seeking to buy either a T-shirt commemorating next Thursday or a birthday gift for your uncle. Be on the lookout for letters from the Internal Revenue Service.
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This isn't me! What am I?

Mark Twain said "I wonder how much it would take to buy soap buble if there was only one in the world."
"When you play, play hard; when you work, don't play at all. "

-- Theodore Roosevelt, 26th US president

JLEO
Journal of Law, Economics and Organization
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