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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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VOTING RULES

The guidelines followed by groups of individuals or members of society when making collective or joint decisions that involve casting formal indications of choice (that is, votes). The five most noted voting rules are majority, super majority, unanimity, plurality, and weighted. These rules determine if a choice is or is not approved by the voting group. Voting rules are important for the study of public choice and government inefficiencies that arise in the voting process due to the median voter, logrolling, and the voting paradox.

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Today, you are likely to spend a great deal of time at a going out of business sale hoping to buy either a hepa filter for your furnace or a wall poster commemorating next Thursday. Be on the lookout for small children selling products door-to-door.
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Al Capone's business card said he was a used furniture dealer.
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