लेखक: James L. Guth

Janet M. Box-Steffensmeier is Vernal Riffe Professor of Political Science, courtesy professor of sociology, and director of the program in Statistics and Methodology at Ohio State University. She is the coeditor of the 2008 Oxford Handbook of Political Methodology with Henry E. Brady and David Collier and coauthor of Event History Modeling: A Guide for Social Scientists with Bradford S. Jones. Steven E. Schier is Dorothy H. and Edward C. Congdon Professor of Political Science at Carleton College. He is the author or editor of eleven books, most recently Panorama of a Presidency: How George W. Bush Acquired and Spent His Political Capital and numerous scholarly and media articles.