About the Authors

Joshua M. Epstein

To whom correspondence should be addressed. E-mail: jepstein@brookings.edu

Affiliation Economic Studies Program, The Brookings Institution, Washington, D. C., United States of America

D. Michael Goedecke

Affiliation Statistics and Epidemiology, RTI International, Research Triangle Park, North Carolina, United States of America

Feng Yu

Affiliation Statistics and Epidemiology, RTI International, Research Triangle Park, North Carolina, United States of America

Robert J. Morris

Affiliation Statistics and Epidemiology, RTI International, Research Triangle Park, North Carolina, United States of America

Diane K. Wagener

Affiliation Statistics and Epidemiology, RTI International, Rockville, Maryland, United States of America

Georgiy V. Bobashev

Affiliation Statistics and Epidemiology, RTI International, Research Triangle Park, North Carolina, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JE DG GB. Performed the experiments: DG FY RM. Analyzed the data: JE DG GB DW. Wrote the paper: JE DG GB DW. Other: Built and tested the model: FY RM DG.