Jonathan A. Rodden is Professor of Political Science at Stanford University, Senior Fellow at the Hoover Institution, and founder of the Stanford Spatial Social Science Lab. He is author of an award-winning book, Hamilton's Paradox: The Promise and Peril of Fiscal Federalism (Cambridge, 2005), as well as a new book on political geography, Why Cities Lose: The Deep Roots of the Urban-Rural Political Divide (forthcoming). Erik Wibbels is the Robert O. Keohane Professor of Political Science at Duke University, North Carolina, and the co-editor of the Cambridge Studies in Comparative Politics series. His research focuses on development, redistribution, and political geography. He also works with bilateral and multilateral donors to improve the design and evaluation of governance programming and is a founding member of the DevLab@Duke.