About the Authors
- Paul J. Zak, Jang Park, Levan Efremidze, Karen Redwine, William Matzner
- Center for Neuroeconomics Studies, Claremont Graduate University, Claremont, California, United States of America
- Robert Kurzban
- University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
- Sheila Ahmadi
- Department of Endocrinology, University of California Los Angeles, Los Angeles, California, United States of America
- Ronald S. Swerdloff
- Division of Endocrinology, Harbor University of California Los Angeles Medical Center, Torrance, California, United States of America
- Karla Morgan
- Department of Economics, Whitworth University, Spokane, Washington, United States of America
The authors have declared that no competing interests exist.
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.