Is Being in School Better? The Impact of School on Children's BMI When Starting Age is Endogenous
In this paper, we investigate the impact of attending school on body weight and obesity. We use school starting age cutoff dates to compare weight outcomes for similar age children with different years of school exposure. As is the case with academic outcomes, school exposure is related to unobserved determinants of weight outcomes because some families choose to have their child start school late (or early). If one does not account for this endogeneity, it appears that an additional year of school exposure results in a greater BMI and a higher probability of being overweight or obese. When actual exposure is instrumented with expected exposure based on school starting dates and birthday, the significant positive effects disappear, and most point estimates become negative and insignificant. However, for children not eating the school lunch, there is a significant negative effect on the probability of being overweight.
Financial support from the USDA through the RIDGE Grant Program and the Robert Wood Johnson Foundation's Healthy Eating Research Program (Award #57922) is gratefully acknowledged. We also thank Kosali Simon, Tom DeLeire and seminar participants at Indiana University for helpful comments. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.
Anderson, Patricia M. & Butcher, Kristin F. & Cascio, Elizabeth U. & Schanzenbach, Diaane Whitmore, 2011. "Is Being in School Better? The Impact of School on Children's BMI When Starting Age is Endogeneous" Journal of Health Economics, Elsevier, vol. 30(5), 977-986, September. citation courtesy of