How can schools use low-cost solutions to help children make healthier food choices? David Just is an expert on that topic. An economist by training, he is a professor at Cornell University and co-director, with Brian Wansink, of the Cornell Center for Behavioral Economics in Child Nutrition Programs (BEN Center). His research has included dozens of field and lab experiments that identify the subtle factors in the environment that can lead both children and adults to make the healthier food choices.
October 2017 update: Problems have been reported in the research conducted by researchers at the BEN Center. For an overview, see “The Cookie Crumbles: A Retracted Study Points to a Larger Truth” in the New York Times.