10. Which of the following is false?
(A) If all Gauss-Markov conditions are satisfied, the OLS estimators are unbiased. (B) If all Gauss-Markov conditions are satisfied, the OLS estimators are consistent.
(C) If all Gauss-Markov conditions are satisfied, the OLS estimators have the lowest conditional variance among
all linear conditionally unbiased estimators.
(D) Ifthe conditional variance of ui is heteroscedastic, then Gauss-Markov conditions are violated and the OLS
estimators are biased. (E) None of the above choices (a)-(d).