In recent years, the psychological causes and consequences of poverty have received renewed attention from scientists and policymakers. In this essay, we summarize new developments in this literature. First, we discuss advances in our understanding of the relationship between income and psychological well-being. There is a robust positive relationship between the two, both within and across countries, and in correlational and causal analyses. Second, we summarize recent work on the impact of “scarcity” and stress on economic preferences and decision-making. Our (...) view of this literature is that the evidence is relatively weak. Third, we summarize evidence on the impact of psychological interventions on economic outcomes. Light-touch psychological interventions, such as videos that aim to raise aspirations, have shown some promise in encouraging investment and improving economic well-being. Similarly, psychotherapy and pharmacological mental health treatments have positive effects on economic outcomes. Relative to the effects of cash transfers, these impacts are small in absolute terms and large in per-dollar terms. We conclude by discussing whether a psychological poverty trap is plausible. (shrink)

Did affluence lead to psychological changes such as reduced discounting, and did these changes facilitate the innovation associated with the Industrial Revolution? I argue that claims of this sort are best made when they can be supported by causal evidence and good psychological measurement. When we have neither identifying variation nor adequate measures, the toolbox of psychologists is not useful.