Clifford J. Carrubba is a Professor of Political Science, Chair of the Political Science Department, and Professor of Law, by courtesy, at Emory University, Atlanta. He also founded and is currently serving as the Director of the Institute for Quantitative Theory and Methods at Emory University. Carrubba has published in the American Political Science Review, the American Journal of Political Science, the Journal of Politics, International Organizations, Political Analysis, Legislative Studies Quarterly, Comparative Political Studies, and the Journal of Law, Economics, and Organization. Matthew J. Gabel is a Professor in the Department of Political Science at Washington University, St Louis, where he also serves as the associate chair of the department. In 2010, he was a John Simon Guggenheim Foundation Fellow. He is the author of Interests and Integration (1998) and has written articles for American Political Science Review, the American Journal of Political Science, the Journal of Politics, Legislative Studies Quarterly, the Journal of Common Market Studies, and Comparative Political Studies. Gabel is a founding associate editor of European Union Politics.