Variance

Definition:

A measure of dispersion of a set of data points around their mean value. The mathematical expectation of the average squared deviations from the mean. The square root of the variance is the standard deviation.

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Copyright © 2011 Campbell R. Harvey, Professor of Finance, Fuqua School of Business at Duke University

Term of the Day

Laffer curve

A curve conjecturing that economic output will increase if marginal tax rates are cut. Named after economist Arthur Laffer.

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