1. Center on Social Dynamics and Policy Economics Studies Program The Brookings Institution Washington DC USA
2. Brown School Washington University in St. Louis St. Louis Missouri USA
3. Santa Fe Institute Santa Fe New Mexico USA
4. Division of Chronic Disease Research Across the Lifecourse Department of Population Medicine Harvard Medical School and Harvard Pilgrim Health Care Institute Boston Massachusetts USA
5. Department of Nutrition Harvard T.H. Chan School of Public Health Boston Massachusetts USA
6. Department of Biostatistics and Epidemiology School of Public Health and Health Sciences University of Massachusetts Amherst Amherst Massachusetts USA