Replication Data for: The impact of sustainability-focused nudges on the healthfulness of food selections: A randomized trial of young adults

This repository includes the dataset, Stata do files, and survey codebook to reproduce the analysis of the manuscript "The impact of sustainability-focused nudges on the healthfulness of food selections: A randomized trial of young adults." This was an online randomized controlled trial with a convenience sample of 2,149 US young adults ages 18-25 years old. Participants were randomized to the experimental (n=1,074) or control (n=1,075) arm and were instructed to select one food they would most like to purchase in three different food categories: proteins, frozen meals, and snacks (17 foods/category). Foods in the experimental arm included front-of-package labels that communicated the climate impact of the food (low/medium/high) based on the food’s carbon footprint (operationalized as the food’s greenhouse gas emissions (kg CO2-eq/100g)). If a participant selected a food with a high-climate-impact label, they were shown a social comparison message and offered swaps to low- or medium-climate-impact foods. Participants in the control arm did not see any labels, messages, or swaps. This survey measured the healthfulness of food selections (inverted continuous Nutri-Score score); carbon footprint of food selections (operationalized as kg-CO2-eq); cognitive elaboration; perceived sustainability, healthfulness, and purchase intentions of sustainable and unsustainable foods; injunctive and descriptive norms; acceptability of interventions; sociodemographic characteristics.