Kiviet, J. F.; Pleus, Milan; Poldermans, Rutger - In: Econometrics : open access journal 5 (2017) 1, pp. 1-54
panel data models are growing exponentially in number. However, for researchers it is hard to make a reasoned choice between … weighting matrix in relation to the type of heteroskedasticity; (iii) using (robustified) 1-step or (corrected) 2-step variance … modification of GMM is found to have some potential when the cross-sectional heteroskedasticity is pronounced and the time …