Coefficients: generalized least squares
Panels: heteroskedastic
Correlation: no autocorrelation
Estimated covariances = 5 Number of obs = 100
Estimated autocorrelations = 0 Number of groups = 5
Estimated coefficients = 3 Time periods = 20
Wald chi2(2) = 159.43
Prob > chi2 = 0.0000