The award was presented at the Annual Meeting of the Allied Social Science Associates in Philadelphia for the paper "The Opt In Revolution"  (with Amalia Miller, University of Virginia,  The paper published in the American Economic Journal: Applied Economics in 2012, examines the role of the birth control pill in increasing women’s human capital investments and, ultimately, wages.  It concludes the Pill can account for 10 percent of the convergence of the gender wage gap in the 1980s and 30 percent in the 1990s.