Defence date: 2 May 1995Examining board: Prof. Richard Griffiths, European University Institute (supervisor) ; Prof. Victor Karady, Centre De Sociologie De L'Éducation et de la Culture ; Prof. Rene Leboutte, European University Institute ; Prof. Michael Müller, European University Institute (co-supervisor) ; Prof. Jerzy Topolski, University of PoznańFirst made available online: 2 September 201