Identifiability of the random effects' covariance matrix of the linear mixed model
COMMUNICATIONS IN STATISTICS-THEORY AND METHODS(2023)
摘要
Novel necessary and sufficient conditions for the identifiability of the linear mixed model are derived. These conditions either relax or generalize previously reported conditions. The novel conditions are translated to criteria that can be checked for most commonly employed parametrizations of the random effect's covariance matrix of linear mixed model.
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关键词
Injectivity,normality,non linear parametrization
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