1. Economics Studies Program, Center on Social Dynamics and Policy, The Brookings Institution, Washington, DC, USA.
2. Public Health, Brown School, Washington University in St. Louis, St. Louis, MO, USA.
3. Santa Fe Institute, Santa Fe, NM, USA.
4. Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA.
5. School of Population Health, University of Auckland, Auckland, New Zealand.
6. Global Obesity Centre (GLOBE), Institute for Health Transformation, Deakin University, Geelong, Victoria, Australia.