| Article ID: | iaor19992098 |
| Country: | United States |
| Volume: | 18 |
| Issue: | 1/2 |
| Start Page Number: | 109 |
| End Page Number: | 128 |
| Publication Date: | Jan 1998 |
| Journal: | American Journal of Mathematical and Management Sciences |
| Authors: | Rao Poduri S.R.S. |
Estimation of the variance and covariance matrices of the random effects and the residuals is considered. The Multivariate Analysis of Variance (MANOVA) and the Restricted Maximum Likelihood estimators are examined. A simple procedure for adjusting the MANOVA estimator for nonnegativeness is suggested. For both balanced and unbalanced designs, biases and mean square errors of the different procedures are compared through simulation studies.