2006, Part of book or chapter of book (Georg, W. (ed.), Soziale Ungleichheit im Bildungssystem: Eine empirisch-theoretische Bestandsaufnahme, pp. 147-174)
2004, Part of book or chapter of book (Arum, R.; Müller, W. (ed.), The reemergence of self-employment : a comparative study of self-employment dynamics and social inequality, pp. 104-134)