Publication Abstract Display |
Type: Published Manuscript |
Title: A likelihood approximation and shrinkage for unbalanced repeated measures. |
Authors: Abramson I, Wolfson T, and the HNRC Group |
Year: 2002 |
Publication: Sankhya Series B |
Volume: 64 Issue: 3 Pages: 301-321 |
Abstract:"SUMMARY. A simplifying likelihood approximation based on a sufficient data reduction by least squares is given for the mixed repeated measures (RM) model. Efficient parameter estimation is based on the approximation and on a transparent and numerically simple EM--algorithm. BLUPs of the random effects are obtained by an empirical Bayes shrinkage applicable even under relaxed distributional assumptions, and an application to an HIV case study is illustrated with graphics. |