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The box-cox transformation: review and extensions

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  • Atkinson, Anthony C.
  • Riani, Marco
  • Corbellini, Aldo

Abstract

The Box-Cox power transformation family for non-negative responses in linear models has a long and interesting history in both statistical practice and theory, which we summarize. The relationship between generalized linear models and log transformed data is illustrated. Extensions investigated include the transform both sides model and the Yeo-Johnson transformation for observations that can be positive or negative. The paper also describes an extended Yeo-Johnson transformation that allows positive and negative responses to have different power transformations. Analyses of data show this to be necessary. Robustness enters in the fan plot for which the forward search provides an ordering of the data. Plausible transformations are checked with an extended fan plot. These procedures are used to compare parametric power transformations with nonparametric transformations produced by smoothing.

Suggested Citation

  • Atkinson, Anthony C. & Riani, Marco & Corbellini, Aldo, 2021. "The box-cox transformation: review and extensions," LSE Research Online Documents on Economics 103537, London School of Economics and Political Science, LSE Library.
    • Handle: RePEc:ehl:lserod:103537
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    File URL: http://eprints.lse.ac.uk/103537/
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    Cited by:

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    More about this item

    Keywords

    ACE; AVAS; constructed variable; extended Yeo-Johnson transformation; forward search; linked plots; robust methods; Department of Statistics;
    All these keywords.

    JEL classification:

    • C1 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General

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