Using data from a randomised experiment in Kenya, we estimate the causal effect of social networks on technology adoption. In this experiment, farmers were invited to information sessions about the use of Tissue Culture Banana (TCB), an in vitro banana cultivation technology. We find that an...

I show that malaria misdiagnosis, common in resource-poor settings, decreases the expected effectiveness of an important new therapy - since only a fraction of treated individuals have malaria - and reduces the rate of learning via increased noise. Using pilot program data from Tanzania, I...