About the Authors

Bin Liu

Affiliation Google Inc, 1600 Amphitheater Parkway, Mountain View, California, United States of America

Ramesh Govindan

Affiliation University Southern California, Department of Computer Science, Los Angeles, California, United States of America

Brian Uzzi

uzzi@northwestern.edu

Affiliation Northwestern Institute on Complex Systems (NICO), Northwestern University, Evanston, Illinois, United States of America

Competing Interests

The funder (Google) provided support in the form of salaries for author BL. The authors confirm that this commercial affiliation does not alter their adherence to all PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: BL RG BU. Performed the experiments: BL RG BU. Analyzed the data: BL RG BU. Contributed reagents/materials/analysis tools: BL RG BU. Wrote the paper: BL RG BU.