1. Introduction: John Cawley of Cornell University ; 2. The Epidemiology of Obesity: Aviva Must and E. Whitney Evans of Tufts University ; 3. The Demography of Obesity: Christine L. Himes of Syracuse University ; 4. The Cliometrics of BMI and Obesity: Scott Alan Carson of University of Texas - Permian Basin ; 5. The Anthropology of Obesity: Amanda L. Thompson and Penny Gordon-Larsen of University of North Carolina ; 6. The Psychology of Obesity: Ashley Moskovich of Duke University, Jeff Hunger of California State University at Fullerton, and Traci Mann of University of Minnesota. ; 7. The Sociology of Obesity: Jeffrey Sobal of Cornell University ; 8. The Economics of Obesity: John Cawley of Cornell University ; 9. Behavioural Economics and Obesity: Julie S. Downs and George Lowenstein of Carnegie-Mellon University ; 10. Obesity Politics and Policy: Rogan Kersh of New York University and James Morone of Brown University ; 11. Fat Studies: Esther D. Rothblum of San Diego State University ; 12. Publicly-Available Data Useful for Social Science Research on Obesity: Inas Rashad Kelly of Queens College, City University of New York ; 13. The Complex Systems Science of Obesity: Diane T. Finegood of Simon Fraser University ; 14. Challenges for Causal Inference in Obesity Research: M. Christopher Auld of University of Calgary and Paul Grootendorst of University of Toronto ; 15. Race, Ethnicity and Obesity: Renee Walker and Ichiro Kawachi of Harvard University ; 16. Socioeconomic Status and Obesity: Lindsay McLaren of University of Calgary ; 17. The Nutrition Transition and Obesity: Barry M. Popkin of University of North Carolina - Chapel ; 18. Peer Effects and Obesity: Jason M. Fletcher of Yale University ; 19. Maternal Employment: Patricia M. Anderson of Dartmouth College ; 20. Depression and Obesity: Ellen Granberg of Clemson University ; 21. Food Marketing, Television and Video Games: Elizabeth A. Vandewater of Research Triangle Institute and Ellen A. Wartella of Northwestern University ; 22. Portion Size and the Obesity Epidemic: Tanja V.E. Kral of University of Pennsylvania and Barbara J. Rolls of Pennsylvania State University ; 23. Mindless Eating: Brian Wansink of Cornell University ; 24. Food Assistance and Obesity: Michele Ver Ploeg of U.S. Department of Agriculture, Economic Research Service ; 25. Physical Activity and the Built Environment: James F. Sallis, Marc A. Adams, and Ding Ding of San Diego State University ; 26. Food Deserts: Dianna Smith and Steven Cummins of University of London ; 27. Food Prices, Income and Body Weight: Darius Lakdawalla of University of Southern California and Yuhui Zheng of the National Bureau of Economic Research ; 28. Policy and Childhood Obesity: John Cawley of Cornell University and Barrett Kirwan of University of Maryland ; 29. Obesity and Medical Costs: Eric Finkelstein and Hae Kyung Yang of Duke University / National University of Singapore ; 30. Obesity and Mortality: Neil K. Mehta of University of Michigan and Virginia W. Chang of University of Pennsylvania ; 31. Schooling and Human Capital: Khoa Truong of Clemson University and Roland Sturm of RAND ; 32. Labor Market Consequences: Employment, Wages, Disability, and Absenteeism: Susan L. Averett of Lafayette College ; 33. Bias, Stigma and Discrimination: Rebecca M. Puhl of Yale University ; 34. Medical and Social Scientific Debates over Body Weight: Abigail C. Saguy of University of California - Los Angeles and Paul Campos of University of Colorado ; 35. The Imperative of Changing Public Policy To Address Obesity: Christina A. Roberto and Kelly D. Brownell of Yale ; 36. Economic Perspectives on Obesity Policy: Tomas J. Philipson and Richard A. Posner of University of Chicago ; 37. Lessons for Obesity Policy from the Tobacco Wars: Frank J. Chaloupka of University of Illinois at Chicago. ; 38. Food Taxes and Subsidies: Evidence and Policies for Obesity Prevention: Lisa M. Powell and Jamie F. Chriqui of University of Illinois at Chicago ; 39. School-Based Interventions: Tamara Brown of Liverpool University. ; 40. Workplace Obesity Prevention Programs: Ron Z. Goetzel of Emory University, Niranjana Kowlessar of Thomson Reuters, Enid Chung Roemer of Emory University, Xiaofei Pei, of Thomson Reuters, Maryam Tabrizi of Thomson Reuters, Rivka C. Liss-Levinson of Emory University, Daniel Samoly of Emory University and Jessica Waddell of Thomson Reuters. ; 41. Community Interventions: Christina D. Economos and Sarah A. Sliwa of Tufts University ; 42. Regulation of Food Advertising: Pauline M. Ippolito of Federal Trade Commission ; 43. Unintended Consequences of Obesity Prevention Messages: Sahara Byrne and Jeff Niederdeppe of Cornell University ; 44. Behavioral Treatment of Obesity: LaShanda Jones-Corneille, Rebecca M. Stack and Thomas Wadden of University of Pennsylvania ; 45. Anti-Obesity Drugs and Bariatric Surgery: William Encinosa of Agency for Healthcare Research and Quality, Dongyi Tony Du of the Food and Drug Administration, and Didem Bernard of Agency for Healthcare Research and Quality ; 46. Correlates of Successful Maintenance of Weight Loss: Victoria Catenacci, Paul MacLean, Lorri Ogden, Sarit Polsky, Holly Wyatt, and James Hill of University of Colorado ; 47. Cost Effectiveness of Anti-Obesity Interventions: Social Science Insights Into Treatment, Prevention, and Policymaking: Larissa Roux of University of British Columbia