About the Authors

Paul J. Zak

paul@pauljzak.com

Affiliation Center for Neuroeconomics Studies, Claremont Graduate University, Claremont, California, United States of America

Robert Kurzban

Affiliation University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

Sheila Ahmadi

Affiliation Department of Endocrinology, University of California Los Angeles, Los Angeles, California, United States of America

Ronald S. Swerdloff

Affiliation Division of Endocrinology, Harbor University of California Los Angeles Medical Center, Torrance, California, United States of America

Jang Park

Affiliation Center for Neuroeconomics Studies, Claremont Graduate University, Claremont, California, United States of America

Levan Efremidze

Affiliation Center for Neuroeconomics Studies, Claremont Graduate University, Claremont, California, United States of America

Karen Redwine

Affiliation Center for Neuroeconomics Studies, Claremont Graduate University, Claremont, California, United States of America

Karla Morgan

Affiliation Department of Economics, Whitworth University, Spokane, Washington, United States of America

William Matzner

Affiliation Center for Neuroeconomics Studies, Claremont Graduate University, Claremont, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PZ RK RSS WM. Performed the experiments: PZ RK SA JP KM. Analyzed the data: PZ RK JP LE KR KM. Wrote the paper: PZ RK RSS WM.