欧州大学院
Among his other professional engagements, he has been Jean Monnet Visiting Professor at the European University Institute, Florence, Italy, 2002; Visiting Scholar, Stanford University, Spring, 2002, Spring, 2004–2008; Fellow at Swedish Collegium for Advanced Study in the Social Sciences (Spring, 1992; Autumn, 1998), and Fellow at the European University Institute (Spring, 1998).