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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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SUPPLY BY A FIRM

The range of quantities of a factor that a firm is willing and able to sell at a range of factor prices. Supply by a firm is a phrase that is most relevant to the study of factor markets, especially when contrasted with supply to a firm. Supply by a firm puts the firm on the selling side of the factor market. Supply to a firm puts the firm on the buying side of the factor market.

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Today, you are likely to spend a great deal of time at the confiscated property police auction hoping to buy either a handcrafted bird house or a weathervane with a chicken on top. Be on the lookout for bottles of barbeque sauce that act TOO innocent.
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The first "Black Friday" on record, a friday marked by a major financial catastrophe, occurred on September 24, 1869 -- A FRIDAY -- when an attempted cornering of the gold market induced a financial crises and economy-wide depression.
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