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On (in)consistency of M-estimators under contamination

Jens Klooster, Bent Nielsen

arXiv 13 Feb 2025 · Mathematics — Statistics Theory

arXiv:2502.09145 · PDF · DOI · OpenAlex · Extracted main text

Abstract

We consider robust location-scale estimators under contamination. We show that commonly used robust estimators such as the median and the Huber estimator are inconsistent under asymmetric contamination, while the Tukey estimator is consistent. In order to make nuisance parameter free inference based on the Tukey estimator a consistent scale estimator is required. However, standard robust scale estimators such as the interquartile range and the median absolute deviation are inconsistent under contamination.

Citation extraction

25
references
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in-text mentions
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distinct cited
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Most heavily cited references

The works this paper leans on most, across its whole bibliography — not restricted to papers in our corpus. Ranked by composite intensity, which combines how often a work is mentioned, how many sections mention it, and how much of that falls in the main text rather than the appendix.

ReferenceIntensityMentionsSectionsMain text
1Huber, P. J (1984) Finite sample breakdown of M-and P-estimators1.00074100%
2Donoho, D. L. and Huber, P. J (1983) The notion of breakdown point0.92844100%
3Huber, P. J. and Ronchetti, E. M (2009) Robust Statistics0.92843100%
4Berenguer-Rico, V., Johansen, S., and Nielsen, B (2023) A model where the Least Trimmed Squares estimator is maximum likelihood self0.87482100%
5Berenguer-Rico, V. and Nielsen, B (2023) Least trim\-med squares asymptotics: Nuisance parameter free asymptotics self0.8434375%
6Rousseeuw, P. J. and Leroy, A. M (1987) Robust Regression and Outlier Detection0.81142100%
7Huber, P. J (1964) Robust estimation of a location parameter0.81142100%
8Maronna, R. A., Martin, R. D., and Yohai, V. J (2006) Robust Statistics: Theory and Methods0.73732100%
9Hampel, F. R (1971) A general qualitative definition of robustness0.73732100%
10Yu, C. and Yao, W (2017) Robust linear regression: A review and comparison0.73732100%

Showing the top 10 of 25 scored citations.