a. Show that E(Xi?? 2 X???) 5 ai, so that Xi?? 2 X??? is anunbiased estimator for ai (in
Chapter 11, Problem 24(choose chapter or problem)
a. Show that E(Xi?? 2 X???) 5 ai, so that Xi?? 2 X??? is anunbiased estimator for ai (in the fixed effects model).b. With gij 5 Xij? 2 Xi?? 2 X?j? 1 X???, show that gij is anunbiased estimator for gij (in the fixed effectsmodel).
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