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PIGOUVIAN TAX: A tax on an external cost, such as pollution, designed to use market forces to achieve an efficient allocation of resources. A. C. Pigou, one of the first economists to study the market failure of externalities, is credited with developing this tax system for internalizing costs external to the market. An external cost caused by pollution, for example, can be internalized if polluters pay a tax equal to the value of the external cost.

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DERIVED DEMAND

The notion that the demand for a factor of production, or an input used in the production of a good, depends on the demand for the output being produced. This concept highlights the two key aspects of factor demand. One is that factor demand depends on the value of the good being produced. Inputs that produce more valuable outputs are themselves more highly valued. Two is that factor demand depends on the productivity of the input. Inputs that produce more output are themselves more highly valued.

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Today, you are likely to spend a great deal of time surfing the Internet trying to buy either a travel case for you toothbrush or a looseleaf notebook binder. Be on the lookout for slow moving vehicles with darkened windows.
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More money is spent on gardening than on any other hobby.
"Every man must decide whether he will walk in the light of creative altruism or in the darkness of destructive selfishness."

-- Martin Luther King, Jr., clergyman

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