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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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UTIL

A hypothetical unit of measurement of utility that is commonly used by economists to present hypothetical information about utility and consumer demand theory. The util measurement unit was developed as a convenient way to illustrate and discuss concepts such as total utility, marginal utility, and the law of diminishing marginal utility. However, because utility is not a measurable characteristic, the util does represent an actual unit of measurement, such as inches or pounds.

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Today, you are likely to spend a great deal of time flipping through the yellow pages looking to buy either car battery jumper cables or a dozen high trajectory optic orange golf balls. Be on the lookout for neighborhood pets, especially belligerent parrots.
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Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
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