Marketing Foods and Beverages in Schools: The Effect of School Food Policy on Students’ Overweight Measures

Beginning with the 2006–2007 academic year, the U.S. government required that all federally funded schools have local wellness policies to promote healthful living and reduce obesity among their students; however, little evidence exists on which school food policies are effective. This article finds evidence that prohibiting à la carte junk food sales during meals reduces the likelihood that students will be overweight or obese by 18 percentage points. The data are merged student–parent–school survey responses collected from a small sample of schools in one Great Plains state. The estimation controls for students’ activity levels, genetics, and socioeconomic factors; parents’ activity levels and attitudes; and the overall mix of school marketing policies that promote healthful eating and drinking habits. The results indicate that banning à la carte junk food sales is a potentially effective policy to reduce the likelihood of students being overweight and obese.