Darren R. Halpin is Professor, and Head of the School of Sociology, at the Research School of Social Sciences, the Australian National University. He is co-editor of the journal Interest Groups and Advocacy and the Foundation Series Editor for the book series Interest Groups, Advocacy and Democracy (Palgrave, UK). His recent work includes Groups, Representation and Democracy (2010) and The Organization of Political Interest Groups (2014).
David Lowery is the Bruce R. Miller and Dean D. LaVigne Professor of Political Science at Pennsylvania State University, USA. Dr. Lowery teaches and conducts research on the politics of interest representation and bureaucratic politics. He has co-authored The Politics of Dissatisfaction, The Population Ecology of Interest Representation, and Organized Interests in American Politics.
Virginia Gray is the Winston Distinguished Professor of Political Science at the University of North Carolina, Chapel Hill, USA. She teaches and does research on state politics, public policy, and interest groups. She has published numerous articles and books on these topics, including The Population Ecology of Interest Representation (1996) and Interest Groups and Health Care Reform across the United States (2013).