The impact of shelf tags with Nutri-Score on consumer purchases: a difference-in-difference analysis of a natural experiment in supermarkets of a major retailer in Belgium

Last updated on 28-1-2022 by Stefanie Vandevijvere



Background: Delhaize, a major Belgian retailer, started implementing electronic shelf labels (ESL) with Nutri-Score since May 2019. Nutri-Score rates the healthfulness of packaged foods with five colours/letters from red/E (least healthy) to green/A (most healthy). This study evaluated the impact of ESL on consumer purchases, overall, and by food category. Methods: For 43 intervention stores (implementing ESL in the period 27 May 2019-19 June 2019), a control store, from the same province and retailer-assigned cluster was matched. There were 14 unique control stores. By store, …

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