1. Annenberg School for Communication University of Pennsylvania Philadelphia Pennsylvania USA
2. Department of Psychology University of Pennsylvania Philadelphia Pennsylvania United States
3. Department of Psychology Columbia University New York New York United States
4. School of Public Health University of Michigan Ann Arbor Michigan United States
5. Department of Mathematics Dartmouth College Hanover New Hampshire United States
6. Department of Physics and Astronomy University of Pennsylvania Philadelphia Pennsylvania United States
7. Wharton Marketing Department University of Pennsylvania Philadelphia Pennsylvania 19104 United States
8. Wharton Operations, Information and Decisions Department University of Pennsylvania Philadelphia Pennsylvania United States