[1] Univ Essex, Dept Sociol, Colchester, England
[2] Univ Essex, Inst Social & Econ Res, Colchester, England
[3] Humboldt Univ, Inst Educ Qual Improvement IQB, Berlin, Germany
[4] Univ Leipzig, Dept Sociol, Leipzig, Germany
[5] Ctr Int Student Assessment ZIB, Munich, Germany
[6] Berlin Inst Integrat & Migrat Res BIM, Berlin, Germany
[7] Humboldt Univ, Dept Educ Studies, Berlin, Germany
[8] Univ Potsdam, Potsdam, Brandenburg, Germany