New nonlinear estimators of the gravity equation - Mnasri, Ayman; Nechi, Salem (Economic modelling, 2021)
Keywords: Generalized Heckman two-step; Generalized nonlinear least squares; Gravity model; Heteroscedasticity; PPML; Structural zeros; C63; C13; C01; C15; Structural zeros; Gravity model; F14; Generalized Heckman two-step; PPML; Heteroscedasticity; Generalized nonlinear least squares