About the Authors

William A. Griffin

william.griffin@asu.edu

Affiliations Center for Social Dynamics and Complexity, ISTB-1, 530 East Orange Street, PO Box 874804, Arizona State University, Tempe, 85287-4804, Arizona, United States of America, Sanford School of Social and Family Dynamics, Arizona State University, Tempe, Arizona, United States of America

Xun Li

Affiliations Center for Social Dynamics and Complexity, ISTB-1, 530 East Orange Street, PO Box 874804, Arizona State University, Tempe, 85287-4804, Arizona, United States of America, GeoDa Center for Geospatial Analysis and Computation, School of Geographical Sciences and Urban Planning, Arizona State University, Tempe, Arizona, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WAG XL. Performed the experiments: WAG XL. Analyzed the data: WAG XL. Contributed reagents/materials/analysis tools: WAG XL. Wrote the paper: WAG.