Published Quarterly Journal of Economics Online 17 Oct 2025 Published Jan 2026Digital Distractions with Peer Influence: The Impact of Mobile App Usage on Academic and Labor Market OutcomesPanle Jia Barwick · Siyu Chen · Chao Fu · Teng LiThis paper estimates the causal effects of mobile app usage on college students' academic performance, physical health, and labor market outcomes, while separately identifying behavioral (endogenous) …