Gauss Markov conditions summary of problems of violation
6:56
Estimating the population variance from a sample - part one
5:22
Gauss-Markov assumptions part 1
6:23
R squared part 2
6:00
Variance of OLS estimators in the presence of serial correlation
4:48
Unbiasedness of OLS - part one
4:06
Heteroskedasticity summary
5:18
Estimator for the population error variance
22:59