Multiple Choice
The logic of control variables in IV regressions
A) parallels the logic of control variables in OLS
B) only applies in the case of homoskedastic errors in the first stage of two stage least squares estimation
C) is different in a substantial way from the logic of control variables in OLS since there are two stages in estimation
D) implies that the TSLS is efficient
Correct Answer:
Verified
Correct Answer:
Verified
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