Changes in Alcohol Consumption Following a Reduction in the Price of Spirits: A Natural Experiment in Switzerland
Abstract
AimsĀ
To discover what changes in alcohol consumption had occurred in subgroups defined by age, sex, volume of alcohol use and alcohol use occasions, following a reduction in the price of spirits in Switzerland in July 1999.
DesignĀ
Quasiāexperimental. Longitudinal generalāpopulation survey with baseline 3 months before and followāup 3 months after price change.
ParticipantsĀ
Probabilistic telephone sample of 1347 individuals with at least monthly consumption on average in the previous 6 months at both interviews. The response rate at baseline was 74,8% and the attrition rate from baseline to followāup 20.2%.
MeasurementsĀ
Alcohol consumption was assessed by means of a beverageāspecific graduatedāfrequency measure. High volume of alcohol use was defined as 40ā+ g/day for men and 20ā+ g/day for women. Binge alcohol use was defined as six+ units of alcohol on an occasion for men and four+ units of alcohol for women.
FindingsĀ
Spirits consumption increased significantly (by 28.6%) in the total sample, and specifically in young males and in individuals who were lowāvolume alcohol users at baseline. Consumption of alcohol overall, or of wine or beer, did not change significantly. No indication of effects of substitution was found.
ConclusionsĀ
Spirits consumption showed priceāresponsiveness in the early postintervention period. This finding is of particular interest, as (a) the increase in spirits consumption took place at a time of generally declining consumption of alcohol in Switzerland; and (b) in contrast to the findings of most studies, the intervention, namely price reduction, increased availability.