Breakdown and groups

Abstract

The concept of breakdown point was introduced by Hampel [Ph.D. dissertation (1968), Univ. California, Berkeley; Ann. Math. Statist. 42 (1971) 1887-1896] and developed further by, among others, Huber [Robust Statistics (1981). Wiley, New York] and Donoho and Huber [In A Festschrift for Erich L. Lehmann (1983) 157-184. Wadsworth, Belmont, CA]. It has proved most successful in the context of location, scale and regression problems. Attempts to extend the concept to other situations have not met with general acceptance. In this paper we argue that this is connected to the fact that in the location, scale and regression problems the translation and affine groups give rise to a definition of equivariance for statistical functionals. Comparisons in terms of breakdown points seem only useful when restricted to equivariant functionals and even here the connection between breakdown and equivariance is a tenuous one.

This paper discussed in: [math.ST/0508499], [math.ST/0508500], [math.ST/0508501], [math.ST/0508502], [math.ST/0508503], [math.ST/0508504]. Rejoinder in [math.ST/0508505]

References in corpus (10)

• Rejoinder to "Breakdown and groups" by P. L. Davies and U. Gather
• Discussion of "Breakdown and groups" by P. L. Davies and U. Gather
• Discussion of "Breakdown and groups" by P. L. Davies and U. Gather
• Breakdown and groups
• Discussion of "Breakdown and groups" by P. L. Davies and U. Gather
• Discussion of "Breakdown and groups" by P. L. Davies and U. Gather
• Discussion of "Breakdown and groups" by P. L. Davies and U. Gather
• Discussion of "Breakdown and groups" by P. L. Davies and U. Gather
• Densities, spectral densities and modality
• Neighborhoods as Nuisance Parameters? Robustness vs. Semiparametrics

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• Discussion of "Breakdown and groups" by P. L. Davies and U. Gather
• Discussion of "Breakdown and groups" by P. L. Davies and U. Gather
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