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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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AVERAGE PROPENSITY TO SAVE

The proportion of household income that is used for saving. The average propensity to save (abbreviated APS) is really nothing more than average saving. Together with the average propensity to consume, it indicates how a given level of income is divided between consumption and saving. A related saving measure is the marginal propensity to save.

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APLS

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MMSE
Minimun Mean Square Error
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