Defence date: 20 February 1998
Examining board: Prof. Klaus Eder (Humboldt Universität Berlin), supervisor ; Prof. Peter Kraus (Humboldt Universität Berlin) ; Prof. Barnabé Lopez García (Autónoma de Madrid) ; Prof. Alfonso Perez-Agote (Univ. Pais Vasco) ; Prof. Philippe C. Schmitter (EUI)