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A Simple Specification Test for the Predictive Ability of Transformation Models
Jeffrey M. Wooldridge
The Review of Economics and Statistics
Vol. 76, No. 1 (Feb., 1994), pp. 59-65
Published by: The MIT Press
Stable URL: http://www.jstor.org/stable/2109826
Page Count: 7
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A specification test is proposed to test the adequacy of the implicit conditional mean specification in a transformation model. Regardless of the transformation under the null, the statistic is computable from OLS output via auxiliary OLS regressions. Further, the test presumes no particular form for the conditional variance of the transformed and untransformed regressands. A simple goodness-of-fit measure that can be used to compare across transformations is a natural byproduct of the analysis. An application to a well-known fisheries data set is included.
The Review of Economics and Statistics © 1994 The MIT Press