Suppose that Y, X, and Z are related as follows:
E(Y | X,Z) = βX + γZ|)
B(Z|X = αX), , are unknown population parameters.
Suppose an economist runs the a linear regression of on only.
a. The OLS estimator will be unbiased for (
b. E(Y|X) = βX
C. E(Y|X) = (β + αγ)X
D. E(Y|X) = βX + γZ)