How Well Do Nudges Work?
The research literature on nudge effectiveness is growing. 2022 started with a new PNAS article reporting a meta analysis of 455 effect sizes from 214 publications. Here's a short summary.
Do Lab Studies Replicate in the Field? The Case of Simplified Nutrition Labels
There is a growing concern that the academic literature, because of publication biases and other limitations of single-shot, lab-based studies, overstates the power of nudges in real life. We examined this issue in a 10-week RCT in 60 supermarkets comparing 4 front-of-pack simplified nutrition labels. The good news is that the ordering of the nutrition labels was the same as in published lab-based studies. The bad news is that our effect sizes were, on average, 17 times smaller than in the published literature.