On Extreme Quantile Region Estimation under Heavy-Tailed Elliptical Distributions
Journal of Multivariate Analysis(2024)
摘要
Consider the estimation of an extreme quantile region corresponding to a very small probability. Estimation of extreme quantile regions is important but difficult since extreme regions contain only a few or no observations. In this article, we propose an affine equivariant extreme quantile region estimator for heavy-tailed elliptical distributions. The estimator is constructed by extending a well-known univariate extreme quantile estimator. Consistency of the estimator is proved under estimated location and scatter. The practicality of the developed estimator is illustrated with simulations and a real data example.
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关键词
Elliptical distribution,Extreme quantile estimation,Heavy-tailed distribution,Multivariate quantile
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