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A Meta-Meta-Analysis of Behavior Change Interventions: Two Tales of Behavior Change

Author

Listed:
  • Tim Kaiser
  • Juliane Kloidt
  • Jutta Mata
  • Ralph Hertwig

Abstract

Behavioral science interventions like incentives, nudges, and boosts are increasingly used in public policy, but their effectiveness remains debated. We conducted a meta-meta-analysis on behavior change interventions across health, finance, and sustainability outcomes. Our analysis covers 838 effects from 269 meta-analyses, encompassing 6,327 randomized controlled trials and over 9 million individuals from non-clinical populations of all ages in both developed and developing economies. Our findings tell two stories: First, extracted treatment effects are generally positive but highly variable (M = .173; SD = .195), indicating some interventions impact behavior. However, after adjusting for publication bias, the mean posterior effect pooling domains and interventions is .063 (95% credible interval .044 to .08, BF10 = 139.8) with substantial unexplained heterogeneity (τ̂ = .129). Future research requires improved reporting and deeper contextual analysis to address this heterogeneity. Even small effect sizes can yield significant impacts when scaled across populations and sustained over time.

Suggested Citation

  • Tim Kaiser & Juliane Kloidt & Jutta Mata & Ralph Hertwig, 2025. "A Meta-Meta-Analysis of Behavior Change Interventions: Two Tales of Behavior Change," CESifo Working Paper Series 11863, CESifo.
    • Handle: RePEc:ces:ceswps:_11863
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    More about this item

    Keywords

    behaviour-change; intervention; heterogeneity; boosting; nudging; publication bias; Bayesian meta-meta-analysis.;
    All these keywords.

    JEL classification:

    • D91 - Microeconomics - - Micro-Based Behavioral Economics - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making
    • G41 - Financial Economics - - Behavioral Finance - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making in Financial Markets
    • I12 - Health, Education, and Welfare - - Health - - - Health Behavior
    • I18 - Health, Education, and Welfare - - Health - - - Government Policy; Regulation; Public Health

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