About the Authors
- Charles G. Nathanson
- Department of Economics, Harvard University, Cambridge, Massachusetts, United States of America
- Corina E. Tarnita, Martin A. Nowak
- Program for Evolutionary Dynamics, Department of Mathematics, Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts, United States of America
The authors have declared that no competing interests exist.
Wrote the paper: CGN CET MAN. Conducted the research: CET, CGN, MAN.