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arXiv 2103.15095math.STstat.TH
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具有固定簇数的线性混合效应模型的随机效应推断

Inference of Random Effects for Linear Mixed-Effects Models with a Fixed Number of Clusters

Chih-Hao Chang, Hsin-Cheng Huang, Ching-Kang Ing

摘要:

我们考虑一个线性混合效应模型的聚类结构,其中的参数估计使用最大似然(ML)的基础上可能不平衡的数据。使用该模型的推断通常基于渐近理论进行,假设聚类数随着样本量趋于无穷大。然而,当集群的数量是固定的,经典的渐近理论下开发的集群的数量是不同的不再有效,并可能导致错误的结论。本文建立了一般情形下随机效应参数ML估计的渐近性质,该估计可用于对固定数目的聚类进行有效的统计推断.我们的渐近定理允许固定效应和随机效应被错误指定,并且两种效应的维度随着样本量而趋于无穷大。

英文摘要:

We consider a linear mixed-effects model with a clustered structure, where the parameters are estimated using maximum likelihood (ML) based on possibly unbalanced data. Inference with this model is typically done based on asymptotic theory, assuming that the number of clusters tends to infinity with the sample size. However, when the number of clusters is fixed, classical asymptotic theory developed under a divergent number of clusters is no longer valid and can lead to erroneous conclusions. In this paper, we establish the asymptotic properties of the ML estimators of random-effects parameters under a general setting, which can be applied to conduct valid statistical inference with fixed numbers of clusters. Our asymptotic theorems allow both fixed effects and random effects to be misspecified, and the dimensions of both effects to go to infinity with the sample size.

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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