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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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EXCHANGE

The process of trading one valuable commodity (good, service, or resource) for another. An exchange can be voluntary, such as what transpires through a market, or involuntary, such as when taxes are imposed by government.

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Today, you are likely to spend a great deal of time at a dollar discount store looking to buy either a coffee table shaped like the state of Florida or storage boxes for your summer clothes. Be on the lookout for mail order catalogs with hidden messages.
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Rosemary, long associated with remembrance, was worn as wreaths by students in ancient Greece during exams.
"Concentration is the secret of strength in politics, in war, in trade, in short in all management of human affairs. "

-- Ralph Waldo Emerson, philosopher, poet

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