Nudges’ Effects Much Weaker Than Claimed

Recent syntheses and unpublished nudge‑unit data suggest average nudging effects are substantially smaller than the published literature indicates, and after correcting for publication bias some authors find no reliable overall effect. Policymakers and nudge units are therefore urged to stop treating 'one nudge fits all' and to invest in rigorous, personalized, and pre‑registered evaluations before scaling interventions. — If nudges are weaker than believed, many low‑cost policy programs and regulatory rationales lose empirical support and require rethinking, changing how governments allocate behavioral‑policy resources and justify interventions.