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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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UTILITY

The satisfaction of wants and needs obtained from the use or consumption of goods and services. The terms utility and satisfaction are, for the most part, used interchangeably in economics. The concept of utility is integral to utility analysis, consumer demand theory, and the microeconomic analysis of consumer behavior and market demand.

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Today, you are likely to spend a great deal of time watching infomercials looking to buy either a how-to book on the art of negotiation or a flower arrangement for your aunt. Be on the lookout for celebrities who speak directly to you through your television.
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A communal society, a prime component of Karl Marx's communist philosophy, was advocated by the Greek philosophy Plato.
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