He is a specialist in comparative public policy and focuses on North American environmental politics, primarily sanitation and water governance, solid waste management, neoinstitutional theory, transnational environmental social movements and experimental methods in public policy. His current research programme focuses on the spatial, political and human dimensions of public service delivery. He is also Associate Editor of the Journal of Environmental Studies and Sciences (JESS), and sits on the editorial board of Water International, Global Environmental Politics, Journal of Environmental Policy and Planning, Environment and Planning C: Politics and Space, and Politics, Groups & Identities.