Effect of extended trading hours on alcohol sales in Norway: a cluster randomised controlled trial

Groetting, Maja Weemes; Bergsvik, Daniel

doi:10.1257/rct.6290-2.1

Cited by 2 publications

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“…Moreover, grocery stores licensed to sell low alcohol content beverages have longer trading hours than monopoly outlets, and possible effects could therefore include a trade leakage from grocery stores to monopoly outlets. Thus, in order to evaluate these possible effects of extended trading hours, the NIPH research team considered a clustered RCT to be the only feasible design [for more details, see 10].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of an alcohol policy measure employing a randomised controlled trial design: Why was it possible?

Rossow

Grøtting

2020

Drug and Alcohol Review

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Some of the best evidence of effects of control policies on alcohol availability stems from controlled experimental studies in the Nordic state‐owned alcohol monopolies. Publications from these studies do not, however, explain the process leading up to the implementation of changes in policy measures under controlled experimental conditions. In September 2020, the Norwegian state alcohol monopoly started the implementation of extended trading hours, employing a randomised controlled trial design. In this commentary, we give an account of the process leading up to this implementation and how the monopoly considered various pro‐ and contra‐arguments in this regard. This case illustrates that willingness to contribute to strengthened scientific evidence on alcohol control policies can be embedded in the social responsibility of a state alcohol monopoly.

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Section: Introductionmentioning

confidence: 99%

Evaluation of an alcohol policy measure employing a randomised controlled trial design: Why was it possible?

Rossow

Grøtting

2020

Drug and Alcohol Review

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Effect of extended trading hours on alcohol sales in Norway: study protocol for a stepped wedge cluster‐randomized trial

Grøtting

Bergsvik

2021

Addiction

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Background and aims Norwegian alcohol policy measures include national restrictions on sales hours and a state monopoly on retail sales. A 1‐hour extension of sales hours on Saturdays in the monopoly outlets took effect from September 2020. We aim to evaluate whether increase in sales hours results in (1) an increase in alcohol sales in the monopoly outlets and (2) an increase in total alcohol sales, including substitution effects from beer sales in grocery stores. Design The extension of Saturday sales hours is implemented within a stepped wedge cluster‐randomized trial design. Block randomization of 62 of the 66 Norwegian trade districts allocated monopoly outlets to one of three sequences regarding date of implementation. Setting and participants A total of 228 of 335 in total Norwegian state monopoly outlets are eligible and included. Intervention The extension of sales hours is from 3 p.m. to 4 p.m. starting on the first Saturday in (i) September 2020, (ii) December 2020 or (iii) March 2021. Measurements Growth rates in monthly alcohol sales, measured in litres of pure alcohol, in eligible monopoly outlets (primary outcome) are obtained together with beverage‐specific sales and alcohol sales in grocery stores (secondary outcomes). The observation period is set to 72 months prior to and 24 months after implementation. Findings Power analyses indicate that this stepped wedge cluster‐randomized controlled trial has a power above 90%, even at a high significance level (α = 0.01) and with other conservative model specifications. The planned trial offers a rare opportunity to study possible causal effects of a relatively small change in a widely used alcohol policy measure.

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Effect of extended trading hours on alcohol sales in Norway: a cluster randomised controlled trial

Cited by 2 publications

References 0 publications

Evaluation of an alcohol policy measure employing a randomised controlled trial design: Why was it possible?

Evaluation of an alcohol policy measure employing a randomised controlled trial design: Why was it possible?

Effect of extended trading hours on alcohol sales in Norway: study protocol for a stepped wedge cluster‐randomized trial

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