Introduction Mark P. Taylor 1. Adolescent weight gain and social networks: is there a contagion effect? Mir M. Ali, Aliaksandr Amialchuk, Song Gao and Frank Heiland 2. Obesity and happiness Marina Selini Katsaiti 3. The relationship between childhood obesity and food insecurity: a nonparametric analysis Oluyemisi Kuku, Steven Garasky and Craig Gundersen 4. Socio-economic characteristics and obesity in underdeveloped economies: does income really matter? Awudu Abdulai 5. Dollars and pounds: the impact of family income on childhood weight Y.F Chia 6. Race and gender differences in the cognitive effects of childhood overweight Susan L. Averett and David C. Stifel 7. The relationship between smoking, quitting smoking and obesity in Australia: a seemingly unrelated probit approach Nicole Au, Katharina Hauck and Bruce Hollingsworth 8. Tobacco control and obesity: evidence from a cross section of countries Craig A. Gallet 9. Obesity and heart disease awareness: a note on the impact of consumer characteristics using qualitative choice analysis Rodolfo M. Nayga Jr. 10. Social interactions and the contemporaneous determinants of individuals' weight Joan Costa-Font and Joan Gil 11. Low carbohydrate information, consumer health preferences and market demand of fruits in the United States Laxmi Paudel, Murali Adhikari, Jack Houston and Krishna P. Paudel 12. Demand for carbonated soft drinks: implications for obesity policy Rigoberto A. Lopez and Kristen L. Fantuzzi 13. Calories, obesity and health in OECD countries Mario Mazzocchi and W. Bruce Traill 14. The relationship between fast food and obesity Michael L. Marlow and Alden F. Shiers