Reducing drink drive limits is generally regarded an effective strategy to save lives on the road. 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. Estimates from a supply-of-offenses function suggests that the reform did not have much ex-ante scope for sizeable effects. The unavailability of cheaper alternative means of transportation and weak law enforcement seem to have been the main channels behind the lack of an impact. We find no externality on a wide range of domains, from alcohol consumption to criminal activities other than drink driving.

减少酒后驾驶限制通常被认为是挽救道路上生命的有效策略。我们使用几个新的行政数据源，评估了 2014 年在苏格兰引入的更严格限制的影响。这种减少对酒后驾驶和道路碰撞没有影响。对犯罪供给函数的估计表明，改革没有太大的事前空间来产生相当大的影响。没有更便宜的替代交通方式和执法不力似乎是影响缺乏的主要渠道。我们在广泛的领域都没有发现外部性，从饮酒到酒后驾驶以外的犯罪活动。