The Economics faculty has an agreement of double-degree with the french university of "Paris-Dauphine". If you pass the full fourth year of "Business Administration" there, then you'll be able to get the degree for both the "Universidad Autónoma de Madrid" and the "Paris-Dauphine" university.
Facultad de Ciencias Económicas y Empresariales · C/ Francisco Tomás y Valiente, 5 · Universidad Autónoma de Madrid · 28049 Madrid · España