Defence date: 5 December 2005Examining board: Prof. Iñaki Aguirre Zabala, Departemento de Derecho Internacional Público, Relaciones Internacionales e Historia del Derecho y de las Instituciones, UPV/EHU ; Prof. Leonardo Morlino, Dipartimento di Scienze della Politica e Sociologia, Università degli Studi di Firenze ; Prof. Friedrich Kratochwil, Department of Social and Political Sciences, European University Institute ; Prof. Michael Keating, Department of Social and Political Sciences, European University Institute (Supervisor)First made available online 9 September 201