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Bayesian nonparametric estimation in the current status continuous mark model

机译:当前状态连续标记模型中的贝叶斯非参数估计

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摘要

Abstract We consider the current status continuous mark model where, if an event takes place before an inspection time T a “continuous mark” variable is observed as well. A Bayesian nonparametric method is introduced for estimating the distribution function of the joint distribution of the event time (X) and mark variable (Y). We consider two histogram‐type priors on the density of (X,Y). Our main result shows that under appropriate conditions, the posterior distribution function contracts pointwisely at rate n/logn?ρ3(ρ+2) if the true density is ρ‐H?lder continuous. In addition to our theoretical results we provide efficient computational methods for drawing from the posterior relying on a noncentered parameterization and Crank–Nicolson updates. The performance of the proposed methods is illustrated in several numerical experiments.
机译:摘要 我们考虑了当前状态连续标记模型,其中,如果事件发生在检查时间T之前,则还会观察到“连续标记”变量。引入贝叶斯非参数方法估计事件时间(X)和标记变量(Y)联合分布的分布函数。我们考虑了 (X,Y) 密度的两个直方图类型先验。我们的主要结果表明,在适当条件下,如果真实密度为ρ−H?lder连续,则后验分布函数以n/logn?ρ3(ρ+2)的速率逐点收缩。除了我们的理论结果外,我们还提供了有效的计算方法,用于从后验绘图,依赖于非中心参数化和 Crank-Nicolson 更新。通过数值实验验证了所提方法的性能。

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