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arXiv 1709.06288stat.ME
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聚类数据的共轭广义线性混合模型

Conjugate generalized linear mixed models for clustered data

Jarod Y. L. Lee, Peter J. Green, Louise M. Ryan

摘要:

本文研究了一类聚类数据的广义线性混合模型,其中随机效应唯一映射到分组结构上,且组间相互独立.我们得到的必要条件和充分条件,使这类模型的边际似然以封闭形式表示。使用高斯分布、泊松分布、二项分布和Γ分布进行了说明。这些模型被统一在一个单一的共轭广义线性混合模型的保护伞下,其中“共轭”是指边际似然可以用封闭形式表示的事实,而不是通过贝叶斯范式进行推断。具有明确的边际可能性意味着这些模型在计算上更方便,这在大数据环境中可能很重要。除了二项分布之外,这些模型能够实现同时共轭,因此能够适应单位和组水平的协变量。

英文摘要:

This article concerns a class of generalized linear mixed models for clustered data, where the random effects are mapped uniquely onto the grouping structure and are independent between groups. We derive necessary and sufficient conditions that enable the marginal likelihood of such class of models to be expressed in closed-form. Illustrations are provided using the Gaussian, Poisson, binomial and gamma distributions. These models are unified under a single umbrella of conjugate generalized linear mixed models, where "conjugate" refers to the fact that the marginal likelihood can be expressed in closed-form, rather than implying inference via the Bayesian paradigm. Having an explicit marginal likelihood means that these models are more computationally convenient, which can be important in big data contexts. Except for the binomial distribution, these models are able to achieve simultaneous conjugacy, and thus able to accommodate both unit and group level covariates.

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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