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arXiv 2103.07689math.STmath.PRstat.TH
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重尾杂质混合模型的极值分析

Extreme value analysis for mixture models with heavy-tailed impurity

Vladimir Panov, Ekaterina Morozova

摘要:

本文讨论了混合模型中某些参数随观测值增长而变化的三角阵的极值分析。当混合参数很小时,很自然地将其中一个组分与“杂质”(在规则变化分布的情况下,“重尾杂质”)相关联,该杂质“污染”另一个组分。我们发现,可能的极限分布的集合是更多样的比经典的Fisher-Tippett-Gnedenko定理,并提供了数值例子,显示所提出的模型的效率,研究的最大值的股票收益率。

英文摘要:

This paper deals with the extreme value analysis for the triangular arrays, which appear when some parameters of the mixture model vary as the number of observations grow. When the mixing parameter is small, it is natural to associate one of the components with "an impurity" (in case of regularly varying distribution, "heavy-tailed impurity"), which "pollutes" another component. We show that the set of possible limit distributions is much more diverse than in the classical Fisher-Tippett-Gnedenko theorem, and provide the numerical examples showing the efficiency of the proposed model for studying the maximal values of the stock returns.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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