About the Authors

Samuel Pavard

To whom correspondence should be addressed. E-mail: pavard@demogr.mpg.de

Affiliations Laboratory of Survival and Longevity, Max Planck Institute for Demographic Research, Rostock, Germany, Groupe d'Éco-Anthropologie, Museum National d'Histoire Naturelle, Paris, France

C. Jessica E. Metcalf

Affiliations Laboratory of Survival and Longevity, Max Planck Institute for Demographic Research, Rostock, Germany, Duke Population Research Institute, Duke University, Durham, North Carolina, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SP. Analyzed the data: SP CM. Wrote the paper: SP CM.