Barbara Schmitter Heisler, Professor Emerita of Sociology, presented a co-authored paper with Martin Heisler, Professor Emeritus of Political Science, University of Maryland, at the 5th General Conference of the European Consortium for Political Research in Potsdam, Germany, September 10-12, 2009. In their paper, titled "Bringing Class Back In: Immigrants and Immigration through the Prism of Class," the authors argued that although the concept of social class has lost currency in the study of immigration, which has tended to focus on citizenship and ethnicity, a reorientation toward class can be useful for understanding current immigration issues. Heisler also acted as a discussant on the same panel.