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DERIVED DEMAND: The notion that the demand for a factor or production, 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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MARKET FAILURES

Imperfections in the exchange process between buyers and sellers that prevent markets from efficiently allocating scarce resources. Market failures come in four varieties -- public goods, market control, externalities, and imperfect information. Market efficiency is achieved if the value of goods produced is equal to the value of foregone production. Markets fail when this efficiency condition is not achieved. Such failures can only be corrected by government intervention.

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Today, you are likely to spend a great deal of time searching for a specialty store seeking to buy either a pair of handcrafted oven mitts or a coffee table shaped like the state of Florida. Be on the lookout for fairy dust that tastes like salt.
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The penny is the only coin minted by the U.S. government in which the "face" on the head looks to the right. All others face left.
"I have no expectation of making a hit every time I come to bat. What I seek is the highest possible batting average."

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