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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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PAPER ECONOMY

Markets, exchanges, and other assorted economic activities that deal with legal or paper claims on physical assets rather than the physical assets. The vast majority of activities for the paper economy take place through financial markets. The paper economy complements production and consumption activities of the real economy that involve product markets and resource markets.

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Today, you are likely to spend a great deal of time browsing through a long list of dot com websites hoping to buy either one of those memory foam pillows or a remote controlled train set. Be on the lookout for infected paper cuts.
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One of the largest markets for gold in the United States is the manufacturing of class rings.
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