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Perceptions of food waste: is there a numerosity bias?

Gilles Grolleau et al.

Journal of Economic Science Association2025https://doi.org/10.1017/esa.2024.3article
AJG 1ABDC A
Weight
0.50

Abstract

While individuals are expected to perceive similarly identical quantities, regardless of the used units (e.g., 1 ton or 1000 kg), several scholars suggest that consumers over-infer quantities when they are presented in bigger and phonetically longer numbers. In two experimental studies, we examine this numerosity bias in the context of household food waste. Unlike previous scholars, manipulating numerosity revealed no effect: perceptions of food waste volume and likelihood to reduce it are not influenced by the used numeric value (2500 g vs. 2.5 kg; Study 1) nor the number of syllables (two kilos eight hundred seventy-five grams vs. three kilograms; Study 2).

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https://doi.org/https://doi.org/10.1017/esa.2024.3

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@article{gilles2025,
  title        = {{Perceptions of food waste: is there a numerosity bias?}},
  author       = {Gilles Grolleau et al.},
  journal      = {Journal of Economic Science Association},
  year         = {2025},
  doi          = {https://doi.org/https://doi.org/10.1017/esa.2024.3},
}

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Perceptions of food waste: is there a numerosity bias?

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Evidence weight

0.50

Balanced mode · F 0.40 / M 0.15 / V 0.05 / R 0.40

F · citation impact0.50 × 0.4 = 0.20
M · momentum0.50 × 0.15 = 0.07
V · venue signal0.50 × 0.05 = 0.03
R · text relevance †0.50 × 0.4 = 0.20

† Text relevance is estimated at 0.50 on the detail page — for your query’s actual relevance score, open this paper from a search result.