About the Authors

Joshua L. Rosenbloom

jlrosenb@iastate.edu

Affiliations Department of Economics, Iowa State University, Ames, Iowa, United States of America, National Bureau of Economic Research, Cambridge, Massachusetts, United States of America

Donna K. Ginther

Affiliations Department of Economics, University of Kansas, Lawrence, Kansas, United States of America, National Bureau of Economic Research, Cambridge, Massachusetts, United States of America

Ted Juhl

Affiliation Department of Economics, University of Kansas, Lawrence, Kansas, United States of America

Joseph A. Heppert

Affiliation Department of Chemistry, University of Kansas, Lawrence, Kansas, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JLR DKG TJ JAH. Performed the experiments: JLR. Analyzed the data: JLR DKG TJ JAH. Wrote the paper: JLR DKG.