About the Authors

Christian Hilbe

hilbe@evolbio.mpg.de

Affiliation Evolutionary Theory Group, Max-Planck Institute for Evolutionary Biology, Plön, Germany

Martin A. Nowak

Affiliation Program for Evolutionary Dynamics, Harvard University, Cambridge, Massachusetts, United States of America

Arne Traulsen

Affiliation Evolutionary Theory Group, Max-Planck Institute for Evolutionary Biology, Plön, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CH MAN AT. Performed the experiments: CH MAN AT. Analyzed the data: CH MAN AT. Wrote the paper: CH MAN AT.