Dr. Mechthild Baumann, Director, Institute for Migration and Security Studies (imss), Berlin, Germany. Prof. Dr. Astrid Lorenz, Institute of Social Sciences, Philosophical Faculty III, Humboldt University Berlin, Germany. Kerstin Rosenow, Dipl. Soz., PhD Student, Research School Ruhr-University Bochum, Chair for Sociology/Organization, Migration, Participation & IMSS Berlin, Germany.Dr. Mechthild Baumann, Director, Institute for Migration and Security Studies (imss), Berlin, Germany. Prof. Dr. Astrid Lorenz, Institute of Social Sciences, Philosophical Faculty III, Humboldt University Berlin, Germany. Kerstin Rosenow, Dipl. Soz., PhD Student, Research School Ruhr-University Bochum, Chair for Sociology/Organization, Migration, Participation & IMSS Berlin, Germany.