A central question in human development and policy design is how environmental factors and interventions at different stages shape individuals’ human capital. This project investigates the long-run effect of adolescent environment on non-cognitive skills. We will use exogenous shocks that influence individuals’ adolescent environment, such as the historical episode of Cultural Revolution in China, where millions of teenagers were forced to leave their urban homes and life to work in the countryside, to establish a causal link between adolescent experience and long-run non-cognitive outcomes, including their core beliefs, preferences, and health outcomes.