We estimate the causal effect of shared e-scooter services on traffic accidents by exploiting variation in availability of e-scooter services, induced by the staggered rollout across 93 cities in six countries. Police-reported accidents in the average month increased by around 8.2% after shared e-scooters were introduced. For cities with limited cycling infrastructure and where mobility relies heavily on cars, estimated effects are largest. In contrast, no effects are detectable in cities with high bike-lane density. This heterogeneity suggests that public policy can play a crucial role in mitigating accidents related to e-scooters and, more generally, to changes in urban mobility.

翻译：我们估计了共用电子摩托车服务对交通事故的因果关系,利用了电子摩托车服务提供情况的差异,这种差异是由六个国家93个城市的大规模推广引起的。在采用共用电子摩托车后,警方报告的事故平均每月增加了8.2%左右。对于自行车基础设施有限、机动性严重依赖汽车的城市,估计影响最大。相反,在自行车车道密度高的城市,无法发现任何影响。这种差异表明公共政策在减少与电子摩托车有关的事故以及更一般而言与城市机动性变化有关的事故方面可以发挥关键作用。