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arXiv 2103.05747math.STstat.MEstat.TH
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广义极值分布的渐近后验正态性

Asymptotic posterior normality of the generalized extreme value distribution

Likun Zhang, Benjamin A. Shaby

AI总结:

针对广义极值分布因不满足标准正则条件导致渐近理论发展不足的问题,本文证明了在给定独立同分布样本时其参数向量的后验分布依分布收敛于三元正态分布。

摘要:

单变量广义极值(GEV)分布是分析稀有事件性质最常用的工具。贝叶斯方法在极值分析中的日益广泛应用需要进行详细的理论研究,但迄今为止该理论发展不足。由于 GEV 不满足标准正则条件,即使是最基本的渐近结果也难以获得。在此,我们证明在给定 $n$ 个独立同分布样本的情况下,GEV 参数向量的后验分布依分布收敛于三元正态分布。该证明需要分析整个参数空间上 GEV 似然函数的积分,由于 GEV 密度的支撑以复杂方式依赖于参数,这需要格外谨慎。

英文摘要:

The univariate generalized extreme value (GEV) distribution is the most commonly used tool for analyzing the properties of rare events. The ever greater utilization of Bayesian methods for extreme value analysis warrants detailed theoretical investigation, which has thus far been underdeveloped. Even the most basic asymptotic results are difficult to obtain because the GEV fails to satisfy standard regularity conditions. Here, we prove that the posterior distribution of the GEV parameter vector, given $n$ independent and identically distributed samples, converges in distribution to a trivariate normal distribution. The proof necessitates analyzing integrals of the GEV likelihood function over the entire parameter space, which requires considerable care because the support of the GEV density depends on the parameters in complicated ways.

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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