University of Illinois--Chicago Professor, Department of Sociology, 2007-present University of California, Santa Barbara Professor Emeritus, Department of Sociology, 2005-present University of Arizona University of Pennsylvania Professor, Department of Sociology, 2005-2007 Research Associate, Population Studies Center, 2004-2007 Sociology Department Undergraduate Chair, 2005-2005 Professor, Department of Sociology, University of California, Santa Barbara, 1983-2005 Professor (Affiliated), Department of St atistics and Applied Probability, UCSB, 1993-2005 Affiliated Faculty, Center for Film, Te levision, and New Media, UCSB, 2002-2005 Fellow, University of California Washington Center, Washington, DC, Fall 2004 Visiting Distinguished John D. MacArthur Professor of Sociology, Northwestern University Spring 2004 Visiting Professor, Graduate School of Management, UCLA, 1985 Chair, Department of Sociology, University of California, Santa Barbara, 1992-1998 Associate Professor, Department of Sociology, University of California, Santa Barbara, 1981-83 Assistant Professor, Department of Sociology, University of California, Santa Barbara, 1977-81 Research Associate, Institute for Research on Poverty, University of Wisconsin, 1975-77