The extent to which environmental regulatory institutions are either "green" or "brown" impacts not just the intensity of regulation at any moment, but also the incentives for the development of new pollution-control technologies. We set up a strategic model of R&D in which a polluter can deploy...

This analysis is an independent replication of Heft-Neal et al. (2020).1 The original authors (HBBVB) provide evidence that particulate matter air pollution increases infant mortality in 30 African nations between 2000 and 2015. They provide three effect estimates. Using ordinary least squares,...

This paper investigates the impacts of COVID-19 safer-at-home polices on collisions and pollution. We find that statewide safer-at-home policies lead to a 20% reduction in vehicular collisions and that the effect is entirely driven by less severe collisions. For pollution, we find particulate...