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arXiv 2108.00754stat.ME
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极值指标的一种新的块估计

A new blocks estimator for the extremal index

Helena Ferreira, Marta Ferreira

摘要:

连续发生极端观测会对社会产生影响。在极值理论中,有一些参数来评估高值聚类的效果,例如极值指数。极值指数的估计是文献中经常出现的主题,为此目的有几种方法。大多数现有的方法依赖于两个参数,其选择会影响估计的性能。在这里,我们考虑一个新的估计只依赖于一个参数,从而有助于减少不确定性的程度。模拟研究提出了激励的结果。还将介绍一个财务数据的应用程序。

英文摘要:

The occurrence of successive extreme observations can have an impact on society. In extreme value theory there are parameters to evaluate the effect of clustering of high values, such as the extremal index. The estimation of the extremal index is a recurrent theme in the literature and there are several methodologies for this purpose. The majority of existing methods depend on two parameters whose choice affects the performance of the estimators. Here we consider a new estimator depending only on one of the parameters, thus contributing to a decrease in the degree of uncertainty. A simulation study presents motivating results. An application to financial data will also be presented.

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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