Answer T/F for each question:

1: If Heteroskedasticity is present in the residuals, then the OLS estimator is no longer the most efficient among all the linear unbiased estimators

2: In a linear regression model, if the dependent variable y is a Binary dummy variable, then the expectation E(y|x) equals the probability P(y = 1|x).

3: In a Probit model, the partial effect of an x variable depends upon the values of all the x variables.

4: In the policy effects analysis, pooled cross sections data could be used for the difference-in-difference estimation

5: Panel data is also called as longitudinal data. With a panel data, the researcher observes the same cross section across time.