The downsides of density, including traffic congestion, contagious disease and crime, were common in Victorian London and classical Rome, just as they are today in Sao Paulo and Lagos. Our urban past provides lessons for developing world cities today. The first lesson, that I highlight, is that...

Urban flooding poses danger to people and places. People can adapt to this risk by moving to safer areas or by investing in private self-protection. Places can offset some of the risk through urban planning and infrastructure investment. By constructing a global city data set that covers the...

Most hospitals and managed care organizations have financial assistance programs that aim to reduce financial burdens and improve health care access for low-income patients. We use administrative data from Kaiser Permanente to study the effects of financial assistance on health care utilization....

Air pollution is known to negatively affect a range of health outcomes. Wildfire smoke is an increasingly important contributor to air pollution, yet extreme smoke events are highly salient and could induce behavioral responses that alter health impacts. We combine geolocated data covering the...

We investigate the source, magnitude, and unevenness of the procyclical forces that shape labor force participation, i.e., the participation cycle, which are important for the implementation of the maximum employment mandate. We show that these forces can be analyzed in real time using a flow...

We examine how export expansion induced by the U.S-Vietnam Bilateral Trade Agreement (BTA) affected migration, school enrollment, work and healthcare use of young children and adolescents in Vietnam. To do so, we exploit variation in tariff reductions across industries associated with the BTA...

This paper estimates the magnitude and distribution of surplus from the knowledge worker gig economy using data from an online labor market. Labor demand elasticities determine workers' wages, and buyers' past market experience shapes both their job posting frequency and hiring rates. We find...

This paper analyzes the heterogeneous effects of monetary policy on workers with differing levels of labor force attachment. Exploiting variation in labor market tightness across metropolitan areas, we show that the employment of populations with lower labor force attachment--Blacks, high school...

We examine whether medical innovation can reinforce existing health disparities by disproportionately benefiting socioeconomically advantaged patients. The reason is that less advantaged patients often do not use new medications. This may be due to high costs of new drugs, but could also reflect...