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UNDERGROUND ECONOMY: Illegal and unreported market transactions and productive activity that escape the watchful eyes of official record keepers. By most estimates, a substantial amount of productive activity takes place in the underground economy for the United States. Of course, these are only estimates because such activity, by definition, goes unreported. Were activity in the underground economy added to official activity in the "overground" economy, then gross domestic product could be boosted by as much as 25% to 50%, or more.

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TOTAL FACTOR COST, PERFECT COMPETITION

The opportunity cost incurred by a perfectly competitive firm when using a given factor of production to produce a good or service. This is the total cost associated with the use of a particular resource or factor of production--it is the total cost of the factor. For a perfectly competitive firm, the price paid is constant and total factor cost increases at a constant rate. Total factor cost is predominately used in the analysis of the factor market. Two derivative factor cost measures are average factor cost and marginal factor cost.

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Today, you are likely to spend a great deal of time going from convenience store to convenience store looking to buy either several orange mixing bowls or clothing for your pet dog. Be on the lookout for vindictive digital clocks with revenge on their minds.
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The average length of a "business lunch" is about 36 minutes.
"The will to win is important, but the will to prepare is vital. "

-- Joe Paterno, football coach

CES
Constant Elasticity of Substitution
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