Vandoros, S; Kawachi, I; (2022) Minimum Alcohol Pricing and Motor Vehicle Collisions in Scotland. American Journal of Epidemiology , 191 (5) pp. 867-873. 10.1093/aje/kwab283.

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Abstract

On May 1, 2018, Scotland introduced a minimum price of 50 pence per unit of alcohol, which led to a reduction in alcohol consumption. As drink-driving is an important risk factor for motor vehicle collisions, we examined whether the minimum alcohol pricing was followed by a decrease in collisions. We took advantage of a case where the minimum price was introduced to 1 population during the study period (Scotland) and another population that served as the control group did not experience this intervention (England and Wales). We used data on the daily number of motor vehicle collisions resulting in death or injury in 2018 and used a differences-in-differences econometric approach, comparing trends before and after the introduction of the minimum price. Controlling for seasonality, we found a small relative decrease in collisions in Scotland compared with England and Wales (difference-in-difference interaction coefficient, -0.35; 95% confidence interval: -0.65, -0.04; P = 0.03). Our results suggest that there was a relative decrease in motor vehicle collisions in Scotland of between 1.52 and 1.90, on average, in the first months after the introduction of the policy. More research is needed to understand any long-term impacts of minimum alcohol pricing.

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