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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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GDP PRICE DEFLATOR

A price index calculated as the ratio nominal gross domestic product to real gross domestic product. Also commonly referred to as the implicit price deflator, the GDP price deflator is used as an indicator of the economy's average price level. This price index is tabulated and reported every three months along with the gross domestic product, national income, and related measures that make up the National Income and Product Accounts maintained by the Bureau of Economic Analysis (BEA). The GDP part of GDP price deflator stands for gross domestic product.

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Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club seeking to buy either an AC adapter that won't fry your computer or a case for your designer sunglasses. Be on the lookout for deranged pelicans.
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