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arXiv 0801.4224stat.ME
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贝叶斯假设检验中Jeffreys散度先验的推广

Generalization of Jeffreys' divergence based priors for Bayesian hypothesis testing

M. J. Bayarri, G. García-Donato

摘要:

在本文中,我们介绍了客观正确的先验分布的假设检验和模型选择的竞争模型之间的分歧的措施的基础上,我们称之为基于分歧(DB)先验。DB先验具有简单的形式和理想的属性,如信息(有限样本)的一致性;通常,它们类似于其他现有的建议,如内在先验;此外,在正常的线性模型的情况下,他们完全重现Jeffreys-Zellner-Siow先验。最重要的是,在具有挑战性的情况下,如不规则模型和混合模型,DB先验是定义良好,非常合理的,而替代方案不是。我们推导出近似DB先验以及MCMC和渐近表达式的相关贝叶斯因素。

英文摘要:

In this paper we introduce objective proper prior distributions for hypothesis testing and model selection based on measures of divergence between the competing models; we call them divergence based (DB) priors. DB priors have simple forms and desirable properties, like information (finite sample) consistency; often, they are similar to other existing proposals like the intrinsic priors; moreover, in normal linear models scenarios, they exactly reproduce Jeffreys-Zellner-Siow priors. Most importantly, in challenging scenarios such as irregular models and mixture models, the DB priors are well defined and very reasonable, while alternative proposals are not. We derive approximations to the DB priors as well as MCMC and asymptotic expressions for the associated Bayes factors.

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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