Research on the collective traps of social media led Leo to create NOMO, an app for helping users spend less time scrolling. NOMO, or No Missing Out, encourages real-life connections and uses nudges to reduce time spent scrolling on social media.

Leo’s work has been featured in the New York Times, the Wall Street Journal, the Washington Post, the Economist, the Financial Times, NPR, TIME magazine, Le Monde, Freakonomics Radio, Bloomberg News, Vox, the New Yorker, the Hill and many other media outlets.   

Leo is a Research Associate at the National Bureau of Economic Research (NBER), a fellow at the Bureau for Research and Economic Analysis of Development (BREAD), and an affiliate at the Abdul Latif Jameel Poverty Action Lab (J-PAL) and at the Pearson Institute. He is also the recipient of a 2016 Sloan Research Fellowship. He received his PhD in economics at Harvard University in 2010.