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Would you like some coffee with your sugar? A natural field experiment on the efficiency and acceptability of setting zero sugars as a default in coffee-vending machines

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Listed:
  • Daniel Priolo

    (EPSYLON - Dynamique des capacités humaines et des conduites de santé - UPVM - Université Paul-Valéry - Montpellier 3)

  • Isabelle Milhabet

    (LAPCOS - Laboratoire d'Anthropologie et de Psychologie Cliniques, Cognitives et Sociales - UNS - Université Nice Sophia Antipolis (1965 - 2019) - UniCA - Université Côte d'Azur)

  • Marilena Bertolino

    (LAPCOS - Laboratoire d'Anthropologie et de Psychologie Cliniques, Cognitives et Sociales - UNS - Université Nice Sophia Antipolis (1965 - 2019) - UniCA - Université Côte d'Azur)

  • Tom Juille

    (GREDEG - Groupe de Recherche en Droit, Economie et Gestion - UNS - Université Nice Sophia Antipolis (1965 - 2019) - CNRS - Centre National de la Recherche Scientifique - UniCA - Université Côte d'Azur)

  • Dorian Jullien

    (CES - Centre d'économie de la Sorbonne - UP1 - Université Paris 1 Panthéon-Sorbonne - CNRS - Centre National de la Recherche Scientifique)

  • Guilhem Lecouteux

    (GREDEG - Groupe de Recherche en Droit, Economie et Gestion - UNS - Université Nice Sophia Antipolis (1965 - 2019) - CNRS - Centre National de la Recherche Scientifique - UniCA - Université Côte d'Azur)

  • Ismaël Rafaï

    (GREDEG - Groupe de Recherche en Droit, Economie et Gestion - UNS - Université Nice Sophia Antipolis (1965 - 2019) - CNRS - Centre National de la Recherche Scientifique - UniCA - Université Côte d'Azur)

  • Pierre Thérouanne

    (LAPCOS - Laboratoire d'Anthropologie et de Psychologie Cliniques, Cognitives et Sociales - UNS - Université Nice Sophia Antipolis (1965 - 2019) - UniCA - Université Côte d'Azur)

Abstract

This paper aims to replicate the effect of a nudge on behavior (efficiency) and acceptability in a natural field experiment. The nudge in our study consists in setting zero sugars as the default level of sugar in hot drinks–vending machines in a French university. We compared Campus A (default option set to 0 sugars) to Campus B (default option set to 3 sugars). We measured the efficiency of this default option by observing the level of sugar actually chosen by the participants, and we measured acceptability through a questionnaire. We hypothesized a high level of efficiency for the nudge and a higher acceptability in Campus A (default option set to 0 sugars) compared to Campus B (default option set to 3 sugars). Our results show that participants with the default option set to zero sugars (Campus A) consumed less sugar than those with the default option set to 3 sugars (Campus B). We also found a high level of acceptability on both campuses, though with no difference between Campus A (where the nudge was implemented) and Campus B (where a future nudge would be implemented). The discussion addresses the applied perspectives and ethical implications of these results.

Suggested Citation

  • Daniel Priolo & Isabelle Milhabet & Marilena Bertolino & Tom Juille & Dorian Jullien & Guilhem Lecouteux & Ismaël Rafaï & Pierre Thérouanne, 2023. "Would you like some coffee with your sugar? A natural field experiment on the efficiency and acceptability of setting zero sugars as a default in coffee-vending machines," Post-Print halshs-04160334, HAL.
    • Handle: RePEc:hal:journl:halshs-04160334
    DOI: 10.1080/23743603.2023.2214964
    Note: View the original document on HAL open archive server: https://shs.hal.science/halshs-04160334
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    References listed on IDEAS

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    1. Romain Cadario & Pierre Chandon, 2019. "Which Healthy Eating Nudges Work Best? A Meta-Analysis of Field Experiments," Post-Print hal-02111755, HAL.
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    Keywords

    behavioral policy; nudge; efficiency; default option; acceptability;
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