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Robustness of least distances estimate in ultivariate linear models 

Author: Zhijun Liu a
Affiliation:   a Department of Mathematics and Statistics, Mississippi State University, Mississippi State, U.S.A
DOI: 10.1080/02331889208802357
Publication Frequency: 6 issues per year
Published in: journal Statistics, Volume 23, Issue 2 1992 , pages 109 - 119
Formats available: PDF (English)
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Abstract

In this paper, the robustness of the least distances (LD) estimate in multivariate linear models, as defined by Bai, Chen, Miao and Rao (1990), is discussed in terms of the influence function as well as the breakdown point. The LD estimate is shown to be more robust than the least squares (LS) estimate. The robustness of the LD is similar to that of the least absolute deviations (LAD) estimate, a well studied robust estimate in the univariate case. In particular, if there are no outliers in the design matrices, the breakdown point of the LD estimate reaches the highest value, 1/2.
Keywords: Breakdown point; influence function; least distance (LD) estimate; robust
AMS 1990 subject classification: 62F35; 62H12; 62J05
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