We assemble a dataset on technology adoption in 1000 BC, 0 AD, and 1500 AD for the predecessors to today's nation states. We find that this very old history of technology adoption is surprisingly significant for today's national development outcomes. Our strong and robust results are for 1500 AD...

We assemble a dataset on technology adoption in 1000 B.C., 0 A.D., and 1500 A.D. for the predecessors to today's nation states. We find that this very old history of technology adoption is surprisingly significant for today's national development outcomes. Although our strongest results are for...

We assemble a dataset on technology adoption in 1000 bc, 0 ad, and 1500 AD for the predecessors to today's nation states. Technological differences are surprisingly persistent over long periods of time. Our most interesting, strong, and robust results are for the association of 1500 AD...

We examine how variation in local economic conditions has shaped the AIDS epidemic in Africa. Using data from over 200,000 individuals across 19 countries, we match biomarker data on individuals' HIV status to information on local rainfall shocks, a large source of variation in income for rural...

Transactional sex is believed to be an important risk-coping mechanism for women in Sub-Saharan Africa and a leading contributor to the HIV/AIDS epidemic. This paper uses data from a panel of women in rural Tanzania whose primary occupation is agriculture. The analysis finds that following a...

An extensive multi-disciplinary literature examines the effects of learning one's HIV status on subsequent risky sexual behaviors. However, many of these studies rely on non-experimental designs; use self-reported outcome measures, or both. This study investigates the effects of a randomly...

An extensive multi-disciplinary literature examines the effects of learning one's HIV status on subsequent risky sexual behaviors. However, many of these studies rely on non-experimental designs; use self-reported outcome measures; or both. In this study, we investigate the effects of a randomly...

An extensive multi-disciplinary literature examines the effects of learning one’s HIV status on subsequent risky sexual behaviors. However, many of these studies rely on nonexperimental designs; use self-reported outcome measures, or both. In this study, we investigate the effects of a...

Using data from a study that randomly assigns offers of HIV testing in two urban centers in East Africa, I examine the effects of testing, taking into account people's beliefs of their HIV status prior to testing. I objectively measure risky sexual behavior using sexually transmitted infections...