“…Recent papers have sought to shed light on the sources of firm heterogeneity, and they have attempted to identify the drivers of different modes of internationalization. These studies show that international firms are more innovative (Atkeson and Burnstein, 2010;Burnstein and Melitz, 2013;Bustos, 2011;Costantini and Melitz, 2008;Ederington and McCalman, 2008), have superior organizational and managerial practices (Bloom and van Reenen, 2007), and benefit from better market access (Lileeva and Trefler, 2010), product diversification (Bernard et al, 2011) or agglomeration economies (Antonietti and Cainelli, 2011a;Rodrìguez-Pose et al, 2013).…”