John Gerring (PhD, University of California, Berkeley, 1993) is Professor of Political Science at Boston University, where he teaches courses on methodology and comparative politics. His books include Social Science Methodology: A Criterial Framework (Cambridge University Press, 2001), Case Study Research: Principles and Practices (Cambridge University Press, 2007), A Centripetal Theory of Democratic Governance (Cambridge University Press, 2008), Concepts and Method: Giovanni Sartori and His Legacy (Routledge, 2009), Social Science Methodology: Tasks, Strategies, and Criteria (Cambridge Univer...