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arXiv 1306.2427stat.ME
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线性混合模型中的模型选择

Model Selection in Linear Mixed Models

Samuel Müller, J. L. Scealy, A. H. Welsh

摘要:

线性混合效应模型在处理广泛的数据类型方面具有高度灵活性,因此在应用程序中得到广泛使用。数据分析中的一个关键部分是模型选择,其目的通常是从可能非常大的候选统计模型集合中选择具有其他期望属性的简约模型。在过去的5-10年里,关于线性混合模型中模型选择的文献增长非常迅速。这个问题比线性回归复杂得多,因为由于计算问题和协方差阵上的半正定约束引起的边界问题,协方差结构的选择并不简单。为了更好地了解现有的方法,它们的属性和它们之间的关系,我们回顾了大量的文献线性混合模型选择。我们安排,实施,讨论和比较模型选择方法的基础上,四个主要的方法:信息标准,如AIC或BIC,收缩方法的基础上惩罚损失函数,如LASSO,栅栏程序和贝叶斯技术。

英文摘要:

Linear mixed effects models are highly flexible in handling a broad range of data types and are therefore widely used in applications. A key part in the analysis of data is model selection, which often aims to choose a parsimonious model with other desirable properties from a possibly very large set of candidate statistical models. Over the last 5-10 years the literature on model selection in linear mixed models has grown extremely rapidly. The problem is much more complicated than in linear regression because selection on the covariance structure is not straightforward due to computational issues and boundary problems arising from positive semidefinite constraints on covariance matrices. To obtain a better understanding of the available methods, their properties and the relationships between them, we review a large body of literature on linear mixed model selection. We arrange, implement, discuss and compare model selection methods based on four major approaches: information criteria such as AIC or BIC, shrinkage methods based on penalized loss functions such as LASSO, the Fence procedure and Bayesian techniques.

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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