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ABSTRACTION METHODS: Abstraction is the process of simplifying the complexities of the real world by ignoring (hopefully) unimportant details, especially (for our purposes) while doing economic analysis. Three common methods of actual, real world abstraction used in economic theories are words, graphs, and equations. Words can be misunderstood. Graphs are a little more precise. And equations tend to be the most precise of the three.

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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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[What's This?]

Today, you are likely to spend a great deal of time at a crowded estate auction seeking to buy either an instructional DVD on learning to the play the oboe or a small, foam rubber football. Be on the lookout for malfunctioning pocket calculators.
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The first paper notes printed in the United States were in denominations of 1 cent, 5 cents, 25 cents, and 50 cents.
"To sit back and let fate play its hand out, and never influence it, is not the way man was meant to operate."

-- John Glenn, astronaut, U.S. senator

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