Frank R. Baumgartner is the Bruce R. Miller and Dean D. LaVigne Professor of Political Science at Penn State University. Jeffrey M. Berry is the John Richard Skuse Professor of Political Science at Tufts University. Marie Hojnacki is associate professor of political science at Penn State University. David C. Kimball is associate professor of political science at the University of Missouri - St. Louis. Beth L. Leech is associate professor of political science at Rutgers University.