TY - JOUR AU - de Quidt, Jonathan AU - Haushofer, Johannes TI - Depression for Economists JF - National Bureau of Economic Research Working Paper Series VL - No. 22973 PY - 2016 Y2 - December 2016 DO - 10.3386/w22973 UR - http://www.nber.org/papers/w22973 L1 - http://www.nber.org/papers/w22973.pdf N1 - Author contact info: Jonathan de Quidt Institute for International Economic Studies Stockholm University 106 91 Stockholm Sweden E-Mail: jonathan.dequidt@iies.su.se Johannes Haushofer Department of Economics Stockholm University Universitetsvägen 10 A Stockholm 106 91 Sweden E-Mail: johannes.haushofer@ne.su.se M1 - published as Jonathan de Quidt, Johannes Haushofer. "Depression through the Lens of Economics: A Research Agenda," in Christopher B. Barrett, Michael R. Carter, and Jean-Paul Chavas, editors, "The Economics of Poverty Traps" University of Chicago Press (2019) M3 - presented at "The Economics of Asset Accumulation and Poverty Traps", June 28-29, 2016 AB - Major depressive disorder (MDD) is one of the most prevalent mental illnesses worldwide. Existing evidence suggests that it has both economic causes and consequences, such as unemployment. However, depression has not received significant attention in the economics literature. In this paper, we present a simple model which predicts the core symptoms of depression from economic primitives, i.e. beliefs. Specifically, we show that when exogenous shocks cause an agent to have pessimistic beliefs about the returns to her effort, this agent will exhibit depressive symptoms such undereating or overeating, insomnia or hypersomnia, and a decrease in labor supply. When these effects are strong enough, they can generate a poverty trap. We present descriptive evidence that illustrates the predicted relationships. ER -