This paper develops a dynamic model of technology adoption featuring strategic complementarities: the benefits of usage increase with the number of adopters. We study the diffusion of new means of payments, where such complementarities are pervasive. We show that complementarities give rise to...

Input subsidies in natural resource sectors are widely believed to cause depletion of the natural capital on which those sectors rely. But identification and data challenges have stymied attempts to empirically estimate the causal effect of subsidies on resource extraction. China's fishing fleet...

We estimate spillovers from public funding for health research in the context of the NIH's Fogarty International Center's AIDS International Training and Research Program, which aims to strengthen scientific capacity in AIDS endemic countries by providing African researchers with training...

We study the impact of the Panama Canal on the development of Canada's manufacturing sector in the years from 1900 to 1939. Using newly digitized county-level data from the Census of Manufactures and a market-access approach, we exploit the plausibly exogenous nature of this historical episode...

We study how financial development affects economic development and wage inequality. We use a large expansion of government-owned banks into Brazilian cities with low bank branch coverage and combine it with data on the universe of employees from 2000-2014. We find that higher financial...

Do non-traditional digital trace data and traditional survey data yield similar estimates of the impact of a cash transfer program? In a randomized controlled trial of Togo's COVID-19 Novissi program, endline survey data indicate positive treatment effects on beneficiary food security, mental...

Nudge interventions have quickly expanded from academic studies to larger implementation in so-called Nudge Units in governments. This provides an opportunity to compare interventions in research studies, versus at scale. We assemble a unique data set of 126 RCTs covering over 23 million...

This paper explores the effects of public health insurance expansions on hospitals' decisions to adopt medical technology. Specifically, we test whether the expansion of Medicaid eligibility for pregnant women during the 1980s and 1990s affects hospitals' decisions to adopt neonatal intensive...

Open access, competitive exploitation can be incredibly damaging to valuable resources and the human populations that depend upon them. Even though wealth, resource rents and stocks are at stake, open access often seems to be ineffectively addressed across time and space. Institutions vary....

Non-target marine fish species and ocean ecosystems are increasingly valuable. Ongoing efforts to preserve them emphasize spatial controls on human entry and use via Marine Protected Areas (MPAs). They cover 7.6% of world oceans and aim for 30% by 2030 under the Convention for Biological...