Default options , incentives and food choices

Objective: Examine whether requiring children to place fruits and vegetables on their lunch trays increases consumption of these items. Design: Observational study that exploits naturally occurring variation between two school districts and a pre-post observational study at schools that changed their lunch policy mid-year. Setting: 15 elementary schools from two school districts, one requiring students to place a fruit or vegetable on their tray and one that does not. In addition, 3 schools that implemented a default option part way through the school year. Subjects: Students at 18 elementary schools (n 41,374 child-day observations) across the two