Gregory J. Wawro is professor of political science at Columbia University. His books include Filibuster: Obstruction and Lawmaking in the U.S. Senate. Ira Katznelson is the Ruggles Professor of Political Science and History at Columbia University. His books include Fear Itself: The New Deal and the Origins of Our Time.
"""[A] major new book…all political scientists stand to learn from this balanced and nonpolemical effort to reorient quantitative analysis for historical social science.""---James Mahoney, Perspectives on Politics"