We conduct field experiments with retail investors recruited from a social trading platform. In our main experiment, we first elicit beliefs about the returns to active investing. We then generate exogenous variation in beliefs by providing treated respondents with information about index funds...

We use randomized grants to generate shocks to capital stock for a set of Sri Lankan microenterprises. We find the average real return to capital in these enterprises is 4.6%-5.3% per year), substantially higher than market interest rates. We then examine the heterogeneity of treatment effects....