This application for a mobility project with research stays in Australia and the U.S. aims at comparing the impact of immigration policies on the selection of immigrants in two major host countries. Equally important, it aims at consolidating CREA’s network of international partnerships with top universities for long-term collaboration.The research program aims at providing new insights on the effects of specific immigration policies on the selection of immigrants. For this purpose, it will favour the combination of three ingredients: (i) collection of measures of immigration policies; (ii) collection of specific information on prospective immigrants subject to these immigration programs; and (iii) use of up-to-date statistical techniques designed for identification of the causal effects.The budget related to this project will fund the mobility costs of two research visits carried out by the applicant. The first one will be in Australia and will concern a research visit at the Macquarie University in Sydney and at the University of Western Australia in Perth. The second stay will be conducted at the University of California, Davis (hereafter mentioned as UC Davis) in the U.S. Both research visits will involve collection of data and research collaboration with world level researchers in the field of the economic analysis of international migration. The whole program aims at studying in a comparative way the impact of immigration policies on the selection of immigrants in two major countries of immigration. The first research project will analyse the impact of changes in immigration programs. In that respect the applicant intends to study the impact of the lifting of the White Australia Policy as a natural experiment. The way this policy was dismantled over time between the 1940s and 1973 allows to identify its causal effects on economic performance. The project will involve collaboration with Chris Parsons, professor at the University of Western Australia.The second project will investigate intended and unintended effects of changes carried out in the visa programs in the U.S. For this purpose, the candidate will collaborate with Professor Giovanni Peri who teaches economics at UC Davis, and is known for being one of the world’s leading researchers in the field of economic analysis of migration, and a reputed expert in US immigration policy. The visit will help the candidate in designing an econometric strategy on the causal effects of changes in immigration policy. In this regard, an important part of the research visit will be devoted to the collection of data on visa programs aimed at attracting skilled immigrants to the U.S., but also the corresponding repercussions on immigration flows.The two projects will give rise to two publications, first in the form of working papers.