---- Acknowledgements ----
We thank Ana Arjona, Karen Ballentine, Bob Bates, David Card, Ernesto Dal Bó, Bill Easterly, Karen Ferree, Mary Kay Gugerty, Anke Hoeffler, Patricia Justino, Stathis Kalyvas, David Leonard, Jason Lyall, Andrew Mack, Daniel Maliniak, Gerard Padro-i-Miquel, Torsten Persson, Dan Posner, Robert Powell, Vijaya Ramachandran, Marta Reynal-Querol, Gérard Roland, Shanker Satyanath, Jacob Shapiro, Ryan Sheely, Stergios Skaperdas, Abbey Steele, Julia Strauss, Dennis de Tray, Philip Verwimp, Barbara Walter, Jeremy Weinstein, our anonymous referees and the editor, Roger Gordon, for comments and discussion. We are deeply grateful to our co-authors on related research: Jeannie Annan, Samuel Bazzi, Bernd Beber, John Bellows, John Dykema, Rachel Glennerster, Gerard Roland, Sebastian Saiegh, Shanker Satyanath, and Ernest Sergenti. Camille Pannu, Abbey Steele, and Melanie Wasserman provided superb research assistance. The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research.