In recent years, several international-comparative studies have analyzed the relationship between migration and native populations' decreasing support for redistributive policies. However, these studies use cross-sectional designs and aggregate the number of foreign-born residents at the national level. Both aspects are theoretically and methodologically problematic. We address these shortcomings by investigating cross-sectional as well as longitudinal effects in the case of Germany, using a combination of individual- and regional-level data for several time points from 1994 to 2010. Our results suggest that native-born populations become more reluctant to support welfare programs when the proportion of foreigners at the regional level incr...