I am a professor in Interdisciplinary Social Science at Utrecht University and the academic director of the European Research Centre on Migration and Ethnic Relations (ERCOMER: www.ercomer.eu). By training I am a social psychologist and an anthropologist. I did my PhD at Erasmus University Rotterdam (1988) and worked as an assistent professor at the Law Faculty. In 1993 I moved to Utrecht university where I became an associate and later full professor in the Department of Social and Behavioral Sciences.

My main research interest is in ethnic identity and interethnic relations. I focus on the nature of ethnic, religious and national identities, and their interrelationships. I am interested in the conditions under which these identities become less or more important and strong, as well as the conditions under which they are experienced as compatible or rather contradictory. In addition, I examine various consequences of these identities, including well-being, group evaluations, and collective behaviour. Furthermore, I focus on interethnic ideologies (e.g., multiculturalism, interculturalism and assimilationism) and the content of social identities in relation to intergroup relations. My most recent research project is on Integroup Toleration for which I received an ERC advanced grant in 2017.

I am the Series Editor of the Ashgate “Research on Migration and Ethnic Relations Book Series”