Roland Bloch is a research associate at the Institute of Sociology and the Center for School and Educational Research at Martin-Luther-University Halle-Wittenberg, Germany.Alexander Mitterle is a research associate at the Institute of Sociology and the Center for School and Educational Research at Martin-Luther-University Halle-Wittenberg, Germany.Catherine Paradeise is a sociologist and Professor Emeritus at University Paris Est-LISIS, France.Tobias Peter is a research associate at the Institute of Sociology at Albert-Ludwigs-University Freiburg, Germany.