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Pitfalls of Rescalling Regression Models with Box-Cox Transformations

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  • Dagenais, M.G.
  • Dufour, J.M.

Abstract

To facilitate maximum likelihood estimation for Box-Cox models, several authors have suggested dividing the dependent variable by its sample geometric mean. This paper points out previously unmentioned drawbacks of this 'recalling.' First, the 'resealed' model is not actually equivalent to the untransformed one, so that the procedure involves more than a unit change. Second, there is no clear interpretation of the parameters after such resealing. The authors suggest an interpretation but find that the usual formulas for standard errors and confidence intervals are not asymptotically valid. Only tests for zero coefficients are valid. Thirdly, the authors discuss the appropriate way of measuring elasticities in such models. Copyright 1994 by MIT Press.
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  • Dagenais, M.G. & Dufour, J.M., 1993. "Pitfalls of Rescalling Regression Models with Box-Cox Transformations," Cahiers de recherche 9333a, Centre interuniversitaire de recherche en économie quantitative, CIREQ.
    • Handle: RePEc:mtl:montec:9333a
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    econometrics;

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