This article questions the slope homogeneity in a gravity equation and proposes a partially heterogeneous framework for its estimation using panel data. We suggest to employ K-mean clustering to group countries according to the gravity equation variables. Further, the gravity model is estimated...

This paper examines theoretically and empirically the extent to which the decision by foreign firms to invest in a group of countries is influenced by economic factors, as opposed to political risk and institutional performance. We consider the importance of these factors as drivers of foreign...