This paper evaluates an experiment in which individuals in rural Malawi were randomly assigned monetary incentives to learn their HIV results after being tested. Distance to the HIV results centers was also randomly assigned. Without any incentive, 34 percent of the participants learned their...

An individual who takes an HIV test can be informed about their own status and risk. Similarly, when friends, family or neighbors learn of a person's HIV status, they may update their beliefs about HIV infection among people they know. Using an experiment conducted in rural Malawi which randomly...

Many open-access resources, such as elephants, are used to produce storable goods. Anticipated future scarcity of these resources will increase current prices and poaching. This implies that, for given initial conditions, there may be rational expectations equilibria leading to both extinction...

Trade sanctions are often criticized as ineffective because they create incentives for evasion or as harmful to the target country's population. Loan sanctions, in contrast, could be self-enforcing and could protect the population from being saddled with "odious debt" run up by looting or...

Colombia's PACES program provided over 125,000 poor children with vouchers that covered the cost of private secondary school. The vouchers were renewable annually conditional on adequate academic progress. Since many vouchers were assigned by lottery, program effects can reliably be assessed by...

This paper reviews recent randomized evaluations of educational programs in developing countries, including programs to increase school participation, to provide educational inputs, and to reform education. It then extracts some lessons for education policy and for the practice and political...