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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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ENTREPRENEURSHIP

A special sort of human effort that takes on the risk of bringing labor, capital, and land together and organizing production. This is one of four basic categories of resources, or factors of production. The other three are labor, capital, and land.

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Today, you are likely to spend a great deal of time watching infomercials seeking to buy either an electric coffee pot with automatic shutoff or a brown leather attache case. Be on the lookout for crowded shopping malls.
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The New York Stock Exchange was established by a group of investors in New York City in 1817 under a buttonwood tree at the end of a little road named Wall Street.
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