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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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SLOPE, AGGREGATE EXPENDITURES LINE

The positive slope of the aggregate expenditures line is the sum of the marginal propensity to consume (MPC), marginal propensity to invest (MPI), and marginal propensity for government purchases (MPG), less the marginal propensity to import (MPM). This slope is greater than zero but less than one, reflecting induced expenditures by the four macroeconomic sectors (household, business, government, and foreign). The slope of the aggregate expenditures line determines the magnitude of the multiplier process.

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Today, you are likely to spend a great deal of time watching infomercials hoping to buy either blue cotton balls or a genuine down-filled pillow. Be on the lookout for rusty deck screws.
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Approximately three-fourths of the U.S. paper currency in circular contains traces of cocaine.
"Plans are only good intentions unless they immediately degenerate into hard work."

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