Do Strict Drink Drive Limits Save Lives?

Reducing drink drive limits is generally regarded an effective strategy to save lives. Using several new administrative data sources, we evaluate the effect of a stricter limit introduced in Scotland in 2014. This reduction had no effect on drink driving and road collisions, including fatal crashes. The unavailability of cheaper alternative means of transportation and weak law enforcement are the main channels behind the lack of an impact. We find no externality on many domains, from alcohol consumption to crime. Estimates from a supply-of-offenses function suggests that the reform did not have much ex-ante scope for sizeable effects.