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LERNER INDEX: The difference between price (p) and marginal cost (mc) as a fraction of price, that is [p-mc]/p. The Lerner index is usually taken as an indicator of market power because the larger the index, the larger the difference between price and marginal cost, that is, the larger the distance between the price and the competitive price. The Lerner index depends on the elasticity of demand. The Lerner index is also called the price-cost margin.

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COMPARATIVE ADVANTAGE

The ability to produce one good at a relatively lower opportunity cost than other goods, especially compared to production in another country. Every person or country has a comparative advantage in production of at least one good or service, even with relatively limited production technology. A related, but contrasting concept is absolute advantage. Both terms are perhaps most important to the study of international trade, but also provide insight into other exchanges.

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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers trying to buy either storage boxes for your family photos or a large, stuffed giraffe. Be on the lookout for door-to-door salesmen.
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General Electric is the only stock from the original 1896 Dow Jones Industrial Average remaining in the current index.
"Progress begins with the belief that what is necessary is possible. "

-- Norman Cousins, editor, writer

NLS
National Longitudinal Survey
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