Jacob S. Hacker is the Stanley B. Resor Professor of Political Science at Yale University. With Paul Pierson, he is the coauthor of four books, including the New York Times bestseller Winner-Take-All Politics. Paul Pierson is the John Gross Endowed Chair and Professor of Political Science at the University of California, Berkeley. With Jacob Hacker, he is the coauthor of four books, including the New York Times bestseller Winner-Take-All Politics.