ASEP/JDS has a collaboration agreement with the World Values Survey (WVS) since 1995, and is the Official Data Archive of the World Values Survey Association of which Jaime Díez Medrano is the director.
ASEP/JDS has conducted the cleaning and production of the official WVS files for the 1995 and 2000/2001, and has collaborated with Tilburg University and Khöln Zentral Archiv in the cleaning, reconstruction and documentation of the official 1981 and 1990 official files. ASEP/JDS also worked with these institutions to produce the first official aggregate file of the Values Surveys for the 1981-1990-1995 and 1999/2000 waves.
ASEP/JDS has also produced the personalized sites for consultation and online analysis of the Values Surveys for both the World Values Survey Association and the European Values Study site.
ASEP/JDS is currently conducting the cleaning of the 2005 WVS wave.