Nudge Theory: Choice Architecture and Behavioral Policy

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1. 11 July 2026 · corrected by Emir Baycan

   5 corrections applied: Johnson & Goldstein (2003): Germany ~12%, UK ~17%;

   the 4% and 28% figures belonged to Denmark and the Netherlands. | Hallsworth et al. (2017) appeared in the Journal of Public Economics, per the article's own reference list. | Benartzi et al. (2017) was published in Psychological Science, per the article's own reference list. | Schultz et al. (2007) social-norms electricity study was conducted in San Marcos, California, not Ojai. | Original Thaler & Benartzi (2004) figures: savings rose from ~3.5% to 13.6% over about 40 months (four pay raises).

   Before

   as low as 4% in Germany and 28% in the United Kingdom... published a large-scale randomized controlled trial in Nature Human Behaviour... 2017 review in the Journal of Marketing Research... field experiment in Ojai, California... over 28 months, average savings rates among SMarT participants increased

   After

   as low as 12% in Germany and 17% in the United Kingdom... published a large-scale randomized controlled trial in the Journal of Public Economics... 2017 review in Psychological Science... field experiment in San Marcos, California... over about 40 months, average savings rates among SMarT participants increased

   Why: Corrected 5 factual errors: Johnson & Goldstein (2003) organ-donation opt-in rates for Germany/UK (the 4%/28% figures belonged to Denmark/Netherlands); Hallsworth et al. (2017) journal (Journal of Public Economics, not Nature Human Behaviour); Benartzi et al. (2017) journal (Psychological Science, not Journal of Marketing Research); Schultz et al. (2007) study location (San Marcos, California, not Ojai); and Thaler & Benartzi (2004) SMarT timeframe (about 40 months, not 28).

   Verified already live in body content at all 5 locations; FAQ's Save More Tomorrow answer already correctly states 40 months.

   View the full record →

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