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Modelling the random effects covariance matrix in longitudinal data

A common class of models for longitudinal data are random effects (mixed) models. In these models, the random effects covariance matrix is typically assumed constant across subject. However, in many situations this matrix may differ by measured covariates. In this paper, we propose an approach to mo...

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Detalhes bibliográficos
Main Authors: Daniels, Michael J., Zhao, Yan D.
Formato: Artigo
Idioma:Inglês
Publicado em: 2003
Assuntos:
Acesso em linha:https://ncbi.nlm.nih.gov/pmc/articles/PMC2747645/
https://ncbi.nlm.nih.gov/pubmed/12720301
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1002/sim.1470
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