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arXiv 1507.04313math.STstat.TH
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有限混合估计的最优速率

Optimal rates for finite mixture estimation

Philippe Heinrich, Jonas Kahn

摘要:

本文研究了有限混合分布的估计率,即混合分布的参数。证明了在一定的正则性和强可辨识性条件下,在给定的$m_0$分量的混合分布周围,$m_0$分量的混合分布的最优局部极小极大估计率为$n^{-1/(4(m-m_0) + 2)}$ .这纠正了陈(1995)在《统计年鉴》中的一篇论文。相比之下,事实证明,有一个(非均匀)逐点估计率$n^{-1/2}$的所有混合分布与有限数量的组件的估计。

英文摘要:

We study the rates of estimation of finite mixing distributions, that is, the parameters of the mixture. We prove that under some regularity and strong identifiability conditions, around a given mixing distribution with $m_0$ components, the optimal local minimax rate of estimation of a mixing distribution with $m$ components is $n^{-1/(4(m-m_0) + 2)}$. This corrects a previous paper by Chen (1995) in The Annals of Statistics. By contrast, it turns out that there are estimators with a (non-uniform) pointwise rate of estimation of $n^{-1/2}$ for all mixing distributions with a finite number of components.

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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