We analyze a simple stochastic environment in which policy makers can be threatened by "nasty" interest groups. In the absence of these groups, the policy maker's desire for reelection guarantees that good policies are implemented for every realization of the shock. When pressure groups can...

We evaluate the effects of a program in Brazil that selects and trains new politicians, addressing three main challenges: selection bias from program screening, self-selection into candidacy, and the need to quantify the contributions of both selection and training in a holistic evaluation. Our...