This research was supported by grants from NIH R01-HD054702 and R01-HD065072; the University of Chicago; The Institute for New Economic Thinking (INET); A New Science of Virtues: A Project of the University of Chicago; the American Bar Foundation; a conference series from the Spencer Foundation; the JB & MK Pritzker Family Foundation; the Buffett Early Childhood Fund; the Geary Institute, University College Dublin, Ireland; and an anonymous funder. The views expressed herein are those of the author and do not necessarily reflect the views of the National Bureau of Economic Research.