Includes bibliographical references (p. 361-385) and indexes.

Introduction to the second edition: a sea change in political method ology / David Collier, Henry E. Brady, and Jason Seawright -- Refocusin g the discussion of methodology / Henry E. Brady, David Collier, and Ja son Seawright -- The quest for standards: King, Keohane, and Verba's De signing social inquiry / David Collier, Jason Seawright, and Gerardo L. Munck -- Doing good and doing better: how far does the quantitative te mplate get us? / Henry E. Brady -- Some unfulfilled promises of quantit ative imperialism / Larry M. Bartels -- How interference in the social (but not the physical) sciences neglects theoretical anomaly / Ronald R ogowski -- Bridging the quantitative-qualitative divide / Sidney Tarrow -- The importance of research design / Gary King, Robert O. Keohane, a nd Sidney Verba -- Critiques, responses, and trade-offs: drawing togeth er the debate / David Collier, Henry E. Brady, and Jason Seawright -- S ources of leverage in casual interference: toward an alternative view o f methodology / David Collier, Henry E. Brady, and Jason Seawright -- P rocess tracing and casual inference / Andrew Bennett -- On types of sci entific inquiry: the role of qualitative reasoning / David A. Freedman -- Data-set observations versus causal-process observations: the 2000 U .S. presidential election / Henry E. Brady -- Addendum: teaching proces s tracing / David Collier -- Regression-based inference: a case study i n failed causal assessment / Jason Seawright -- Design-based inference: beyond the pitfalls of regression analysis? / Thad Dunning -- Glossary / Jason Seawright and David Collier.