Do nudges need a regulatory push? Comparing the effectiveness and implementation of exemplar nudge (size-based) and non-nudge (price-based) dietary interventions

Theresa M. Marteau, Eleni Mantzari and Gareth J. Hollands

Social Science & Medicine, 2025, vol. 373, issue C

Abstract: Changing behaviour across populations is key to improving population health and achieving net zero by 2050, including changing diets. We examine the extent to which nudges, with the potential to contribute to such change, are being implemented alongside traditional approaches. We compare the effectiveness and extent of implementation into policy of two interventions to improve diets: size-based interventions that alter portion, package or tableware size, commonly considered a nudge; and, price-based interventions, including food-item taxes, not considered a nudge.

Keywords: Nudging; Nudge; Choice architecture; Size-based interventions; Price-based interventions; Taxes; Behaviour change; Implementation; Regulation (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1016/j.socscimed.2025.118004

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