Trimmed Comparison of Distributions
Trimmed Comparison of Distributions
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分布的修剪比较
DOI:
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发表时间:
2008
期刊:
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通讯作者:
C. Matrán
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作者:
P. C. Álvarez;E. del Barrio;J. A. Cuesta;C. Matrán
This article introduces an analysis of similarity of distributions based on the L2-Wasserstein distance between trimmed distributions. Our main innovation is the use of the impartial trimming methodology, already considered in robust statistics, which we adapt to this setup. Instead of simply removing data at the tails to provide some robustness to the similarity analysis, we develop a data-driven trimming method aimed at maximizing similarity between distributions. Dissimilarity is then measured in terms of the distance between the optimally trimmed distributions. We provide illustrative examples showing the improvements over previous approaches and give the relevant asymptotic results to justify the use of this methodology in applications.