Multiple Choice
If the functional form of the conditional variance function is incorrect, then
A) the standard errors computed by WLS regression routines are invalid
B) the OLS estimator is biased
C) instrumental variable techniques have to be used
D) the regression R2 can no longer be computed
Correct Answer:

Verified
Correct Answer:
Verified
Q35: The WLS estimator is called infeasible WLS
Q36: In practice, the most difficult aspect of
Q37: (Requires Appendix material)State and prove the Cauchy-Schwarz
Q38: The link between the variance of
Q39: Homoskedasticity means that<br>A)var(u<sub>i</sub>|X<sub>i</sub>)= <span class="ql-formula"
Q41: (Requires Appendix material)If the Gauss-Markov conditions
Q42: Besides the Central Limit Theorem, the other
Q43: Slutsky's theorem combines the Law of Large
Q44: Estimation by WLS<br>A)although harder than OLS, will
Q45: Finite-sample distributions of the OLS estimator and