Jaak
Billiet
Jaak Billiet PhD is Professor of Social Methodology at the Katholieke
Universiteit Leuven,
Belgium
. He is head of the Centre for Data Collection and Analysis at the Department of
Sociology (K.U. Leuven), and is a member of the central co-ordination team of
the European Social Survey, where his task is data quality assessment. His main
methodological research is focused on response effects and the modelling of
measurement error in social surveys. He is involved in longitudinal and
comparative research in the domains of ethnocentrism, political attitudes and
religious orientations.