About the Authors

Luis E. C. Rocha

luis.rocha@tp.umu.se

Affiliation IceLab, Department of Physics, Umeå University, Umeå, Sweden

Fredrik Liljeros

Affiliation Department of Sociology, Stockholm University, Stockholm, Sweden

Petter Holme

Affiliations IceLab, Department of Physics, Umeå University, Umeå, Sweden, Department of Energy Science, Sungkyunkwan University, Suwon, Korea

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LECR FL PH. Performed the experiments: LECR PH. Analyzed the data: LECR FL PH. Wrote the paper: LECR FL PH.