About the Authors

Douglas Almond

Affiliation Department of Economics and School of International and Public Affairs, Columbia University, New York, New York, United States of America

Maya Rossin-Slater


Affiliation Department of Economics, University of California Santa Barbara, Santa Barbara, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: MR DA. Contributed reagents/materials/analysis tools: MR DA. Wrote the paper: MR DA.