Justin H Phillips

Justin H. Phillips is Eaton Professor of Political Science and Chair of the Department of Political Science at Columbia University. He specializes in American state and urban politics, public opinion, and sub-national policymaking, with current research examining the effects of public opinion on policy outcomes and gubernatorial power dynamics in legislative negotiations. He received his PhD from University of California, San Diego.

His research focuses on American political institutions and behavior, particularly state-level politics, partisan polarization, representation gaps, and the impact of institutional reforms on policy outcomes. His methodological expertise includes multilevel regression and poststratification techniques for estimating public opinion dynamics.

Phillips' recent publications examine partisan polarization in state parties, representation gaps in Congress, methodological innovations in public opinion research, and impacts of electoral reforms in California. His work demonstrates consistent focus on how institutional arrangements mediate relationships between public preferences and policy outcomes.