| Abstract
| - This article examines the impact of participation in the National School Lunch Program (NSLP) on children's dietary intake at lunchtime and over 24 hours. Using a fixed effects model to control for selection bias, we find that NSLP participation leads to increased 24-hour intake of six vitamins and minerals—calcium, magnesium, phosphorus, zinc, vitamin B12, and riboflavin—as well as dietary fiber. Participation also leads to a trade-off between children's intake of dietary fat and added sugars whereby participants have higher intakes of dietary fat than nonparticipants but lower intakes of added sugars.
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