The class of linear conditionally unbiased estimators consists of
A) all estimators of ?1 that are linear functions of Y1,…, Yn and that are unbiased, conditional on X1,…, Xn .
B) OLS, WLS, and TSLS.
C) those estimators that are asymptotically normally distributed.
D) all estimators of ?1 that are linear functions of X1,…, Xn and that are unbiased, conditional on X1,…, Xn.
Answer: A
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