A new paper, co-authored by R. Metulini, M. Riccaboni, P. Sgrignoli e S. Schiavo, entitled "The network of migrants and international trade" will be soon published on Economia Politica - Journal of Analytical and Institutional Economics.
forthcoming, doi: 10.1007/s40888-018-0106-6
https://link.springer.com/article/10.1007/s40888-018-0106-6