Assessing Nudge Impact: A Comprehensive Second- Order Monster- Analysis
Hu, B., Z. Xia, Q. Guo, C. Lu, S. Constantino, and X. Ju. 2025. “ Assessing Nudge Impact: A Comprehensive Second-Order Meta-Analysis.” Journal of Behavioral Decision Making 38, no. 5: e70053. https://doi.org/10.1002/bdm.70053.
Post-Publication Review
Hu et al. present a second-order meta-analysis of 14 meta-analyses covering 1,638 studies and nearly 30 million participants. They report an unadjusted mean effect of d=.27d=.27, while PET-PEESE reduces the estimate to approximately zero.
The main problem is that adding more and more studies does not solve the basic problem of extreme…
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