Andreas Zick received his Ph.D. at the University of Marburg in 1996, worked from 1998 to 2003 as Assistant Professor at the University of Wuppertal, from 2004 to 2006 at the University of Bielefeld. From 2006 until now he headed the departments for social psychology at the Unversities of Dresden and Jena. Recently he received a call to become professor at the University of Bielefeld. His research interests include migration as well as studies on prejudice, racism, and discrimination in Europe; right-wing extremism; social dominance and the self-concept in social identity. Thomas F. Pettigrew is Research Professor of Social Psychology at the University of California, Santa Cruz. He received his Ph.D. at Harvard University (1956) and taught there until 1980. From 1986 until 1991, he taught at the University of Amsterdam. Pettigrew has published ten books and more than 200 articles and reviews on prejudice and racism. He also received the Society for Experimental Social Psychology’s Distinguished Scientist Award (2001), a Senior Fellowship at the Research Institute of Comparative Studies in Race and Ethnicity at Stanford University (2001), and a Fulbright New Century Scholar Fellowship for continued research on prejudice and discrimination against the immigrants of Western Europe (2003). Ulrich Wagner is Professor of Social Psychology and vice-director of the Center for Conflict Studies at Philipps-University Marburg in Germany. Dr Wagner’s research interests include intergroup relations, ethnic prejudice, and intergroup aggression. Wagner heads the special graduate school addressing Group Focused Enmity, sponsored by the Deutsche Forschungsgemeinschaft [German Science Foundation]. During the academic year 2003-2004, he was a Senior Fellow at the Research Institute of Comparative Studies in Race and Ethnicity at Stanford University.