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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, GOVERNMENT PURCHASES LINE

The positive slope of the government purchases line is also termed the marginal propensity for government purchases (MPG). This slope is greater than zero but less than one, reflecting induced government purchases. The slope of the government purchases line affects the slope of the aggregate expenditures line and thus also affects the magnitude of the multiplier process.

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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors hoping to buy either a pair of designer sunglasses or looseleaf notebook paper. Be on the lookout for letters from the Internal Revenue Service.
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The first paper currency used in North America was pasteboard playing cards "temporarily" authorized as money by the colonial governor of French Canada, awaiting "real money" from France.
"When one door closes another door opens; but we do often look so long and so regretfully upon the closed door, that we do not see the ones which open for us. "

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