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A Simple Test for Heteroscedasticity and Random Coefficient Variation
T. S. Breusch and A. R. Pagan
Vol. 47, No. 5 (Sep., 1979), pp. 1287-1294
Published by: The Econometric Society
Stable URL: http://www.jstor.org/stable/1911963
Page Count: 8
You can always find the topics here!Topics: Statistics, Statistical models, Coefficients, Null hypothesis, Probabilities, Statistical estimation, False positive errors, Simulations, Economic modeling, Lagrangian function
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A simple test for heteroscedastic disturbances in a linear regression model is developed using the framework of the Lagrangian multiplier test. For a wide range of heteroscedastic and random coefficient specifications, the criterion is given as a readily computed function of the OLS residuals. Some finite sampleevidence is presented to supplement the general asymptotic properties of Lagrangian multiplier tests.
Econometrica © 1979 The Econometric Society