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arXiv 1104.0763math.STstat.MEstat.TH
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条件尾指数非参数估计的移动窗口方法

A moving window approach for nonparametric estimation of the conditional tail index

L. Gardes, S. Girard

摘要:

当协变量信息可用时,我们提出了Pareto型分布尾指数的非参数估计族。我们的估计是基于一些选定的观察之间的对数间距的加权和。通过在协变量域上的移动窗口方法和在感兴趣的变量上的随机阈值来实现这种选择。在弱正则性条件下证明了渐近正态性,并对某些权函数进行了说明.有限样本性能的实际数据研究。

英文摘要:

We present a nonparametric family of estimators for the tail index of a Pareto-type distribution when covariate information is available. Our estimators are based on a weighted sum of the log-spacings between some selected observations. This selection is achieved through a moving window approach on the covariate domain and a random threshold on the variable of interest. Asymptotic normality is proved under mild regularity conditions and illustrated for some weight functions. Finite sample performances are presented on a real data study.

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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