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MARGINAL COST: The change in total cost (or total variable cost) resulting from a change in the quantity of output produced by a firm in the short run. Marginal cost indicates how much total cost changes for a give change in the quantity of output. Because changes in total cost are matched by changes in total variable cost in the short run (remember total fixed cost is fixed), marginal cost is the change in either total cost or total variable cost. Marginal cost, usually abbreviated MC, is found by dividing the change in total cost (or total variable cost) by the change in output.

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MOBILITY

The movement of factors of production from one productive activity to another. In particular, mobility is the ease with which resources can change production activities. Mobility generally takes one of two forms--geographic mobility (movement from place to place) and occupational mobility (movement from job to job). Mobility is a key determinant of factor supply.

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BLUE PLACIDOLA
[What's This?]

Today, you are likely to spend a great deal of time at a garage sale trying to buy either a pair of gray heavy duty boot socks or a 50-foot blue garden hose. Be on the lookout for slightly overweight pizza delivery guys.
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This isn't me! What am I?

A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
"Whenever you see a successful business, someone once made a courageous decision."

-- Peter F. Drucker, business strategist

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Mean Square Error
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