Gini Regressions and Heteroskedasticity

Our joint paper “Gini Regressions and Heteroskedasticity” with Ndéné Ka, Stéphane Mussard and Oumar Hamady Ndiaye just appear in Econometrics.

We propose an Aitken estimator for Gini regression. The suggested A-Gini estimator is proven to be a U-statistics. Monte Carlo simulations are provided to deal with heteroskedasticity and to make some comparisons between the generalized least squares and the Gini regression. A Gini-White test is proposed and shows that a better power is obtained compared with the usual White test when outlying observations contaminate the data