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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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GEOGRAPHIC MOBILITY

The mobility, or movement, of factors of production from a productive activity in one location to a productive activity in another location. In particular, geographic mobility is the ease with which resources can change locations. This is one of two types of mobility. The other is occupational mobility.

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Today, you are likely to spend a great deal of time watching infomercials seeking to buy either a travel case for you toothbrush or a looseleaf notebook binder. Be on the lookout for infected paper cuts.
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Helping spur the U.S. industrial revolution, Thomas Edison patented nearly 1300 inventions, 300 of which came out of his Menlo Park "invention factory" during a four-year period.
"Do not go where the path may lead, go instead where there is no path and leave a trail."

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