About the Authors
- Shripad D. Tuljapurkar
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*To whom correspondence should be addressed. E-mail: tulja@stanford.edu
Affiliation Department of Biological Sciences, Stanford University, Stanford, California, United States of America
- Cedric O. Puleston
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Affiliation Department of Biological Sciences, Stanford University, Stanford, California, United States of America
- Michael D. Gurven
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Affiliation Department of Anthropology, University of California at Santa Barbara, Santa Barbara, California, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: ST. Performed the experiments: ST CP. Analyzed the data: ST CP MG. Contributed reagents/materials/analysis tools: MG. Wrote the paper: ST CP. Other: Contributed to development of ideas: MG. Gathered and analyzed empirical data: MG. Assisted in editing: MG. Performed calculations and analysis: CP. Helped develop ideas: CP.