P2: Austrian Academy of Sciences/Vienna Institute of Demography (OEAW-VID)
P3: Max Planck Institute for Demographic Research (MPG)
P4: University of Antwerp (UA)
P5: Institut National D’etudes Demographiques (INED)
P6: University of Vienna (UNIVIE)
P7: University of Groningen (RUG)
* Participation terminated
P8: European University Institute (EUI)
P9: Collegio Carlo Alberto (CCA)
P10: Erasmus University Rotterdam (EUR)
P11: The University of Liverpool (Liverpool)
P12: International Federation for Family Development (IFFD)
P13: Age Platform Europe (AGE)
P14: European Large Families Confederation (ELFAC)
P15: Consejo Superior de Investigaciones Cientificas (CSIC)
P17: Babeş-Bolyai University (BBU)
P18: German Youth Institute (DJI)
P19: University of Leuven (K.U.LEUVEN)
P20: London School of Economics and Political Science (LSE)
P21: Population Research Institute, Väestöliitto (PRI)
P22: The University of Edinburgh (UEDIN)
P23: University of Lausanne (UNIL)
P24: Leiden University (UNILEIDEN)
P25: Universidad Nacional de Educación a Distancia (UNED)
P26: University of Padova (UNIPD)
P27: Warsaw School of Economics (SGH)
P28: Centre for Social Sciences, Hungarian Academy of Sciences (MTA TK)