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Abstract Estimation techniques for linear covariance components models are developed and illustrated with special emphasis on explaining computational processes. The estimation of fixed and random effects when the variances and covariances are known is presented in Bayesian terms, Point estimates of the unknown variances and covariances are computed using the EM algorithm for maximum likelihood estimation from incomplete data. The techniques are illustrated with data on law schools, field mice, and professional football teams. Key Words: Covariance componentsLinear modelsMixed modelsRandom effectsMaximum likelihoodEM algorithm
Dempster et al. (Mon,) studied this question.
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