The modules 2013 (“National Identity III”) and 2014 (“Citizenship II”) of the International Social Survey Programme in the Netherlands [ISSP-NL] were conducted in March-September 2014 as a stand-alone postal survey at VU University Amsterdam [VUA] (Faculty of Social Sciences, Department of Sociology) by Harry B.G. Ganzeboom [principal investigator] and Hanna Rovers [fieldwork manager]. Note that the complete dataset is more elaborate than the Dutch part of the international ISSP file, archived at GESIS - Leibniz Institute for the Social Sciences, Cologne, Germany.