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arXiv 2102.12460math.STstat.TH
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局部渐近二次随机场的简化拟似然分析

Simplified quasi-likelihood analysis for a locally asymptotically quadratic random field

Nakahiro Yoshida

摘要:

Le Cam和Hajek的渐近决策论通过关于似然随机场收敛性的Largimov-Hasminskii理论得到了一个清晰的透视。他们的方案已被应用于随机过程的库托扬,今天这个情节被称为IHK计划。该方案确保了估计量的渐近性质直接从随机场的收敛性,如果存在大偏差估计。拟似然分析证明了一个多项式型大偏差不等式通过程序的一个瓶颈。QLA的一个结论是,如果拟似然随机场是渐近二次的,并且反映随机场可识别性的关键指标是非退化的,则PLD不等式总是成立,从而IHK程序可以运行。许多研究已经利用了QLA理论。然而,其中不少人仍在以低效的方式使用它。本文的目的是提供一个改革和简化版本的QLA,并提高理论的可及性。作为基于PLD的理论的效果的示例,用户可以通过仅验证关键指标的非退化性来获得准贝叶斯估计的渐近性质。

英文摘要:

The asymptotic decision theory by Le Cam and Hajek has been given a lucid perspective by the Ibragimov-Hasminskii theory on convergence of the likelihood random field. Their scheme has been applied to stochastic processes by Kutoyants, and today this plot is called the IHK program. This scheme ensures that asymptotic properties of an estimator follow directly from the convergence of the random field if a large deviation estimate exists. The quasi-likelihood analysis (QLA) proved a polynomial type large deviation (PLD) inequality to go through a bottleneck of the program. A conclusion of the QLA is that if the quasi-likelihood random field is asymptotically quadratic and if a key index reflecting identifiability the random field has is non-degenerate, then the PLD inequality is always valid, and as a result, the IHK program can run. Many studies already took advantage of the QLA theory. However, not a few of them are using it in an inefficient way yet. The aim of this paper is to provide a reformed and simplified version of the QLA and to improve accessibility to the theory. As an example of the effects of the theory based on the PLD, the user can obtain asymptotic properties of the quasi-Bayesian estimator by only verifying non-degeneracy of the key index.

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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