Zbignev Gricevic is a Ph.D. student at the Berlin Graduate School of Social Sciences (BGSS) at the Humboldt-Universität zu Berlin. He obtained his Masters Degree in Social Structure and Inequality from Bielefeld University. His research explores how social environment influences pro-social attitudes and behaviors. In his Ph.D. project Zbignev investigates how exposure to economic and ethnic out-groups affects private contributions to public goods. He is especially interested in the possible moderating effect of socio-economic and ethnic segregation.