arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1802.06248math.STstat.TH
收藏

平稳先验下贝叶斯逻辑斯谛回归的Polya-Gamma Gibbs抽样的几何遍历性

Geometric ergodicity of Polya-Gamma Gibbs sampler for Bayesian logistic regression with a flat prior

Xin Wang, Vivekananda Roy

摘要:

逻辑斯谛回归模型是分析二进制数据最常用的模型。在贝叶斯逻辑斯谛回归模型中,在没有先验信息的情况下,回归系数往往采用不适当的平坦先验。由此产生的顽固性后壁密度可以通过运行Polson et al.的(2013)数据增强(DA)算法。在本文中,我们建立了马尔可夫链的基础上Polson等人。的(2013)DA算法是几何遍历的。证明这一理论结果具有重要的实际意义,因为它保证了有限二阶矩条件下样本平均值的中心极限定理的存在性。CLT又允许DA算法的用户计算后验估计的标准误差。

英文摘要:

The logistic regression model is the most popular model for analyzing binary data. In the absence of any prior information, an improper flat prior is often used for the regression coefficients in Bayesian logistic regression models. The resulting intractable posterior density can be explored by running Polson et al.'s (2013) data augmentation (DA) algorithm. In this paper, we establish that the Markov chain underlying Polson et al.'s (2013) DA algorithm is geometrically ergodic. Proving this theoretical result is practically important as it ensures the existence of central limit theorems (CLTs) for sample averages under a finite second moment condition. The CLT in turn allows users of the DA algorithm to calculate standard errors for posterior estimates.

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。

↑