One of the most compelling talks I saw at this year’s American Economics Association conference was by Katherine Milkman, an assistant professor at the Wharton School at Penn. She holds a joint Ph.D. in computer science and business, but her passion is behavioral economics — and, specifically, how its findings can be applied to help people in their daily lives. Milkman and her research are the focus of our latest Freakonomics Radio episode, “When Willpower Isn’t Enough.”