arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1108.1972math.STstat.APstat.TH
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极端依赖:一些贡献

Extremal dependence: some contributions

Helena Ferreira, Marta Ferreira

摘要:

由于全球化和放松的市场监管,我们帮助增加了对国际市场的极端依赖。因此,近年来,基于多元极值理论,在文献中提出了几种尾部相关性的度量方法。本文给出了两个随机向量之间的尾相依函数和极值相依系数,推广了已有的相依函数和极值相依系数。我们将看到,在削弱通常所需的依赖允许评估依赖量的$d$变量随机向量的基础上二维技术。将陈述非常简单的估计量,并且可以应用于众所周知的\emph{stable tail dependence function}。并导出了渐近正态性和强相合性。最后将介绍对金融市场的应用。

英文摘要:

Due to globalization and relaxed market regulation, we have assisted to an increasing of extremal dependence in international markets. As a consequence, several measures of tail dependence have been stated in literature in recent years, based on multivariate extreme-value theory. In this paper we present a tail dependence function and an extremal coefficient of dependence between two random vectors that extend existing ones. We shall see that in weakening the usual required dependence allows to assess the amount of dependence in $d$-variate random vectors based on bidimensional techniques. Very simple estimators will be stated and can be applied to the well-known \emph{stable tail dependence function}. Asymptotic normality and strong consistency will be derived too. An application to financial markets will be presented at the end.

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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