1. School of Information, University of Michigan, Ann Arbor, MI, USA
2. Kellogg School of Management, Northwestern University, Evanston, IL, USA
3. Northwestern Institute on Complex Systems, Northwestern University, Evanston, IL, USA
4. Laboratory for Innovation Science at Harvard, Harvard University, Boston, MA, USA
5. Department of Computer Science & Engineering, University of Michigan, Ann Arbor, MI, USA