Longitudinal analysis of personal networks : the case of Argentinean migrants in Spain - Lubbers, Miranda J.. (Universitat Autònoma de Barcelona. Departament d'Antropologia Social i Cultural) ; Molina, José Luis (Molina González) (Universitat Autònoma de Barcelona. Departament d'Antropologia Social i Cultural) ; Lerner, Jürgen (University of Konstanz. Department of Computer and Information Science) ; Brandes, Ulrik (University of Konstanz. Department of Computer and Information Science) ; Ávila Molero, Javier (Universitat Autònoma de Barcelona. Departament d'Antropologia Social i Cultural) ; McCarty, Christopher (University of Florida. Bureau of Economic and Business Research)