Evidence suggests that firms in poor countries stagnate because they cannot access growth-conducive markets. We hypothesize that overlooked heterogeneity in marketing ability distorts market access. To investigate, we gave a random subset of Liberian firms vouchers for a week-long program that...

Informal institutions govern property rights and disputes when formal systems are weak. Well-functioning institutions should help people reach and maintain bargains, minimizing violence. Can outside organizations engineer improvements and reduce violent conflicts? Will this improve property...

Field experiments rely heavily on self-reported data, but subjects may misreport behaviors, especially sensitive ones such as crime. If treatment influences survey responses, it biases experimental estimates. We develop a validation technique that uses intensive qualitative work to assess survey...

We show that a number of "noncognitive" skills and preferences, including patience and identity, are malleable in adults, and that investments in them reduce crime and violence. We recruited criminally-engaged men and randomized half to eight weeks of cognitive behavioral therapy designed to...

The study of autocracies and weakly institutionalized countries is plagued by scarcity of information about the relative strength of different players within the political system. This paper presents novel data on the composition of government coalitions in a sample of fifteen post-colonial...