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An analysis of constrained robust regression estimators

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  • Ronald G. Askin
  • Douglas C. Montgomery

Abstract

Multicollinearity and nonnormal errors are problems often encountered in the application of linear regression. Estimators are proposed for dealing with the simultaneous occurrence of both multicollinearity and nonnormality. These estimators are developed by combining biased estimation techniques with certain robust criteria. An iteratively reweighted least‐squares procedure is used to compute the estimates. The performance of the combined estimators is studied empirically through Monte Carlo experiments structured according to factorial designs. With respect to a mean‐squared‐error criterion, the combined estimators are superior to ordinary least‐squares, pure biased estimators, and pure robust estimators when multicollinearity and nonnormality are present. The loss in efficiency for the combined estimators relative to least squares is small when these problems do not occur. Some guidelines for the use of these combined estimators are given.

Suggested Citation

  • Ronald G. Askin & Douglas C. Montgomery, 1984. "An analysis of constrained robust regression estimators," Naval Research Logistics Quarterly, John Wiley & Sons, vol. 31(2), pages 283-296, June.
    • Handle: RePEc:wly:navlog:v:31:y:1984:i:2:p:283-296
    DOI: 10.1002/nav.3800310210
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