The PhD thesis has been written at Maastricht University (under the supervision of Maarten Vink and Thomas Christiansen). I successfully defended the thesis on 20 March 2015. You can view my PhD thesis here.
You can view the propositions here.
Parts of the dissertation have been published in an article for Neue Gesellschaft/Frankfurter Hefte (in German) and in various blog posts for the Network Refugee Research (in German). Peer-reviewed articles were published in the European Journal of Migration and Law and in the Zeitschrift für Vergleichende Politikwissenschaft (in German).