European Research Workshop in International Trade (ERWIT) CREI conference organized by Paula Bustos (CREI, UPF and CEPR), Simon J Evenett (Universität St Gallen and CEPR), Gino Gancia (CREI, UPF and CEPR), Gianmarco Ottaviano (London School of Economics and CEPR) and Diego Puga (IMDEA Social Sciences and CEPR) (held jointly with the Fourth EFIGE Scientific Workshop and Policy Conference)