Baltagi, Badi H et al. Comparative study of alternative estimators for the unbalanced two-way error component regression model J5309 2002 - 2002 - 480-493 V. 05 Issue. 2 Subjects--Topical Terms: Econometrics Subjects--Index Terms: Panel data;Unbalanced ANOVA;MINQUE:MLE;REML;Variance components;