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ABSTRACTION: Simplifying the complexities of the real world by ignoring (hopefully) unimportant details while doing economic analysis. Abstraction is often criticized because it's, well, it's JUST NOT REALISTIC. However, when done correctly (ignoring things that JUST DON'T MATTER), then the pursuit of knowledge is greatly enhanced by abstraction. For example, when travelling cross country along a high-speed interstate highway, a paper road map is a handy tool. It shows towns and cities along the way, the major intersections, rest stop locations, and other important points of interest. However, it ignores unimportant details. It doesn't realistically show the location of every tree, bush, or blade of grass. Why bother? This information won't enhance your road trip.

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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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RED AGGRESSERINE
[What's This?]

Today, you are likely to spend a great deal of time touring the new suburban shopping complex trying to buy either a hepa filter for your furnace or a wall poster commemorating next Thursday. Be on the lookout for vindictive digital clocks with revenge on their minds.
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This isn't me! What am I?

Al Capone's business card said he was a used furniture dealer.
"Do you want to be safe and good, or do you want to take a chance and be great?"

-- Jimmy Johnson, Football Coach

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