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Zero variance Markov chain Monte Carlo for Bayesian estimators

机译:贝叶斯估计量的零方差马尔可夫链蒙特卡洛

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摘要

Interest is in evaluating, by Markov chain Monte Carlo (MCMC) simulation, the expected value of a function with respect to a, possibly unnormalized, probability distribution. A general purpose variance reduction technique for the MCMC estimator, based on the zero-variance principle introduced in the physics literature, is proposed. Conditions for asymptotic unbiasedness of the zero-variance estimator are derived. A central limit theorem is also proved under regularity conditions. The potential of the idea is illustrated with real applications to probit, logit and GARCH Bayesian models. For all these models, a central limit theorem and unbiasedness for the zero-variance estimator are proved (see the supplementary material available on-line).
机译:感兴趣的是通过马尔可夫链蒙特卡罗(MCMC)仿真评估函数相对于可能的非标准化概率分布的期望值。提出了一种基于物理学文献中介绍的零方差原理的MCMC估计器通用方差减少技术。推导出零方差估计量的渐近无偏的条件。在正则条件下也证明了一个中心极限定理。通过将实际应用应用于概率,logit和GARCH贝叶斯模型,可以说明这种想法的潜力。对于所有这些模型,证明了零方差估计量的中心极限定理和无偏性(请参见在线提供的补充材料)。

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