“…The positive role of migrants on trade has been extensively analyzed by various papers (e.g., Head and Ries, 1998;Rauch, 1999Rauch, , 2001Rauch and Trindade, 2002;Felbermayr and Toubal, 2012). While most of the earlier contributions fail to convincingly assess a causal relation due to endogeneity issues and poor data quality (Felbermayr et al, 2015), recent papers use instrumental variable strategies (Peri and Raquena-Silvente, 2010;Ottaviano et al, 2018;Cardoso and Ramanarayanan, 2019;Marchal and Nedoncelle, 2019;Orefice et al, 2021) or natural experiments (Parsons and Vézina, 2018;Bahar et al, 2022;Olney and Pozzoli, 2021) to assess causality. However, these papers either do not allow to distinguish the skill of the migrant or embed almost exclusively low skilled migrant flows (mostly from developing countries), and we know little about the mechanisms by which foreign workers foster trade.…”