1. Media Laboratory, Systems, & Society, Massachusetts Institute of Technology, Cambridge, MA, USA
2. Data61 Unit, Commonwealth Scientific and Industrial Research Organization, Melbourne, Victoria, Australia
3. Kellogg School of Management, Northwestern University, Evanston, IL, USA
4. Northwestern Institute on Complex Systems, Northwestern University, Evanston, IL 60208, USA
5. London Mathematical Lab, London WC2N 6DF, UK
6. Institute for Data, Systems, & Society, Massachusetts Institute of Technology, Cambridge, MA, USA