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KALDOR-HICKS EFFICIENCY: A type of efficiency that results if the monetary value of society's resources are maximized. This is achieved if the marginal willingness to pay by those who benefit from an action is equal to the marginal willingness to accept of those harmed. If this condition is not achieved, then a Kaldor-Hicks improvement is possible. Kaldor-Hicks efficiency, named after Nicholas Kaldor and John Hicks, is the theoretical basis of benefit-cost analysis, a technique commonly used to evaluate the desirability of producing public goods (such as parks, highways, or reservoirs). This is one of two noted efficiency criteria used in economics. The other is Pareto efficiency.

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OLIGOPOLY, CONCENTRATION

Oligopoly is a market structure that contains a small number of relatively large firms, meaning oligopoly markets tend to be concentrated. A small number of large firms account for a majority of total output. Concentration unto itself is not necessarily bad, but it often leads to inefficient behavior, such as collusion and nonprice competition. Concentration is measured in three ways--market share, concentration ratio, Herfindahl index.

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Today, you are likely to spend a great deal of time searching for a specialty store looking to buy either shoe laces for your snow boots or a rim for your spare tire. Be on the lookout for defective microphones.
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It's estimated that the U.S. economy has about $20 million of counterfeit currency in circulation, less than 0.001 perecent of the total legal currency.
"Each of us is issued but one life, and we know full well how it all ends. It would be regrettable to squander this one chance on someone else's appearance, someone else's experience. "

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