History, Expectations, and Leadership in the Evolution of Social Norms
---- Acknowledgements ----
This working paper was previously circulated as "History, Expectations, and Leadership in the Evolution of Cooperation." We thank David Jimenez-Gomez for excellent research assistance and several useful suggestions. We also thank seminar participants at Berkeley, the Canadian Institute for Advanced Research, Harvard-MIT, Stanford, Northwestern, Penn (PIER), Princeton, Santa Barbara and UC San Diego for helpful comments. We gratefully acknowledge financial support from the NSF grants SES-0961481 and SES-0729361. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.