4.8 Letter

No reason to expect large and consistent effects of nudge interventions

Related references

Note: Only part of the references are listed.
Article Economics

RCTs to Scale: Comprehensive Evidence From Two Nudge Units

Stefano DellaVigna et al.

Summary: Nudge interventions have been widely implemented in both academic studies and government units. However, there are significant differences in the impact of nudges between these two settings. This study compares data from 126 randomized controlled trials (RCTs) conducted by Nudge Units and academic journals, and identifies three factors contributing to the differences: statistical power, characteristics of the interventions, and selective publication. The findings suggest that selective publication and low statistical power are the major contributors to the disparities, while variation in nudge characteristics explains the remaining differences.

ECONOMETRICA (2022)

Article Multidisciplinary Sciences

The effectiveness of nudging: A meta-analysis of choice architecture interventions across behavioral domains

Stephanie Mertens et al.

Summary: Choice architecture interventions, based on insights from behavioral sciences, aim to facilitate desirable decision-making by designing choice environments without limiting freedom of choice. A comprehensive analysis of over 200 studies suggests that these interventions have an overall small to medium effect size in promoting behavior change, with food choices particularly responsive to such interventions.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2022)

Article Multidisciplinary Sciences

Megastudies improve the impact of applied behavioural science

Katherine L. Milkman et al.

Summary: Policy-makers are increasingly turning to behavioural science for insights on improving citizens' decisions and outcomes. The megastudy introduced in this study compared the effects of many different interventions in the same population on objectively measured outcomes, showing promising results in improving exercise habits among participants. This approach highlights the potential for megastudies to enhance the evidentiary value of behavioural science by testing multiple ideas simultaneously.

NATURE (2021)

Article Psychology, Biological

Behavioural science is unlikely to change the world without a heterogeneity revolution

Christopher J. Bryan et al.

Summary: Behavioural science is increasingly shaping policy, but concerns about the replicability of its findings have emerged. Researchers are recommended to utilize heterogeneity in treatment effects to develop more robust theories of causality and strengthen the field.

NATURE HUMAN BEHAVIOUR (2021)

Article Psychology, Applied

A Systematic Scoping Review of the Choice Architecture Movement: Toward Understanding When and Why Nudges Work

Barnabas Szaszi et al.

JOURNAL OF BEHAVIORAL DECISION MAKING (2018)