As a consequence he was also member of the Central Coordinating Team of the ESS from 2000 till 2012 .
In 1998 , he became member of the methodology group that prepared the start of the European Social Survey ( ESS ) .
As a consequence he was also member of the Central Coordinating Team of the ESS from 2000 till 2012 .
In 1998 , he became member of the methodology group that prepared the start of the European Social Survey ( ESS ) .