About the Authors

Ilaria Bordino

Affiliation Yahoo! Research, Barcelona, Spain

Stefano Battiston

Affiliation ETH Chair of System Design, Zurich, Switzerland

Guido Caldarelli

Affiliations Institute of Complex Systems CNR, “Sapienza” University, Rome, Italy, London Institute for Mathematical Sciences, London, United Kingdom, IMT - Institute for Advanced Studies, Lucca, Italy

Matthieu Cristelli

matthieu.cristelli@roma1.infn.it

Affiliation Institute of Complex Systems CNR, “Sapienza” University, Rome, Italy

Antti Ukkonen

Affiliation Yahoo! Research, Barcelona, Spain

Ingmar Weber

Affiliation Yahoo! Research, Barcelona, Spain

Competing Interests

Ilaria Bordino, Antti Ukkonen and Ingmar Weber are affiliated to the company: Yahoo! Research Labs Avinguda Diagonal 177, 8th Floor 08018 Barcelona Catalunya (Spain) This does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: IB SB GC MC AU IW. Performed the experiments: IB SB GC MC AU IW. Analyzed the data: IB SB GC MC AU IW. Contributed reagents/materials/analysis tools: IB SB GC MC AU IW. Wrote the paper: IB SB GC MC AU IW.