Wine glass size and wine sales: four replication studies in one restaurant and two bars

Clarke, N ORCID: 0000-0003-2375-4510, Pechey, R, Pilling, M, Hollands, G.J, Mantzari, E and Marteau, T.M (2019) 'Wine glass size and wine sales: four replication studies in one restaurant and two bars.' BMC Research Notes, 12. e426.

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Abstract

Objective:- Previous research suggests that wine glass size affects sales of wine in bars, with more wine purchased when served in larger glasses. The current four studies, conducted in one restaurant (Studies 1 and 2) and two bars (Studies 3 and 4) in Cambridge, England, aim to establish the reproducibility of this effect of glass size on sales. A multiple treatment reversal design was used, involving wine being served in sequential fortnightly periods in different sized glasses of the same design (290 ml, 350 ml, and 450 ml). The primary outcome was daily wine volume (ml) sold. Results:- Restaurant: Daily wine volume sold was 13% (95% CI 2%, 24%) higher when served with 350 ml vs. 290 ml glasses in Study 1. A similar direction of effect was seen in Study 2 (6%; 95% CI − 1%, 15%). Bars: Daily wine volume sold was 21% (95% CI 9%, 35%) higher when served with 450 ml vs. 350 ml glasses in Study 3. This effect was not observed in Study 4 (− 7%, 95% CI − 16%, 3%). Meaningful differences were not demonstrated with any other glass comparison. These results partially replicate previous studies showing that larger glasses increase wine sales. Considerable uncertainty remains about the magnitude of any effect and the contexts in which it might occur.

Item Type:	Article
Keywords:	wine, alcohol, sales, purchasing, glass size, replication, multiple treatment reversal design, bar, restaurant
Subjects:	B Philosophy. Psychology. Religion > BF Psychology
Divisions:	School of Sciences
Date Deposited:	04 May 2022 12:04
Last Modified:	05 May 2022 05:30
ISSN:	1756-0500
URI / Page ID:	https://researchspace.bathspa.ac.uk/id/eprint/14750

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