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arXiv math/0609590math.STmath.PRstat.TH
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扩散过程不变分布函数的一类无偏估计的有效性

Efficiency of a class of unbiased estimators for the invariant distribution function of a diffusion process

Ilia Negri

摘要:

本文研究了漂移系数未知时遍历扩散过程不变分布函数的估计问题。经验分布函数是一种自然的估计量,它在不同的度量下是无偏的、一致相合的和有效的。在这里,我们研究最近提出的另一种估计的最优性的性质。我们考虑一类无偏估计,我们表明,他们也是有效的意义上说,他们的渐近风险,定义为综合均方误差,达到一个渐近极小极大下界。

英文摘要:

We consider the problem of the estimation of the invariant distribution function of an ergodic diffusion process when the drift coefficient is unknown. The empirical distribution function is a natural estimator which is unbiased, uniformly consistent and efficient in different metrics. Here we study the properties of optimality for an other kind of estimator recently proposed. We consider a class of unbiased estimators and we show that they are also efficient in the sense that their asymptotic risk, defined as the integrated mean square error, attains an asymptotic minimax lower bound.

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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