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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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PERFECT COMPETITION, FACTOR MARKET ANALYSIS

The analysis of a factor market characterized by perfect competition indicates that each buyer maximizes profit by equating marginal revenue product to the factor price. This achieves an efficient allocation of resources and provides a benchmark for analyzing other factor market structures, including monopsony, monopoly, and bilateral monopoly.

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Today, you are likely to spend a great deal of time watching the shopping channel hoping to buy either a T-shirt commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki or a wall poster commemorating the 2000 Olympics. Be on the lookout for mail order catalogs with hidden messages.
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A half gallon milk jug holds about $50 in pennies.
"Life is no brief candle to me. It is a sort of splendid torch which I have got a hold of for the moment, and I want to make it burn as brightly as possible before handing it on to future generations."

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