Our paper deals with econometric developments for the estimation of the gravity model whichlead to convergent parameter estimates even when a correlation exists between theexplanatory variables and the specific unobservable characteristics of each unit. Weimplement panel data econometric...

We present a gravity model that accounts for multilateral resistance, firm heterogeneity and country-selectioninto trade, while accommodating asymmetries in trade flows. A new equation for the proportion of exporting…firms takes a gravity form: the extensive margin is also accected by...