My dissertation covers topics in the economics of crime and the interesction between behavioral and development economics. The first chapter provides causal evidence that sentencing low-level offenders in the State of Michigan to prison rather than probation lowers their future criminal behavior but only through incapacitation, that is, during the time they spend in prison. We identify two sources of incapacitation: primary, from the original sentence, and secondary, from higher rates of future imprisonment among those who were initially sentenced to prison. The second chapter studies how economic decision making changes along the transition from college to the labor market. By collecting panel data from students in a university in Colombia...