10.7910/DVN/VOPUA0ZHANG, YuchiYuchiZHANGThe University of OsakaHarvard Dataverse2026Social SciencesZHANG, YuchiThe University of Osaka2026-03-112026-03-1350691387130021592466text/x-stata-syntaxtext/tab-separated-valuestext/tab-separated-valuestext/plaintext/tab-separated-values1.0CC0 1.0This dataset contains the original observations used in the field experiment examining the effectiveness of social norm–based nudge interventions on food waste reduction in a university dining facility in China. The data record daily measurements of edible plate waste collected during lunchtime across treatment and control dining halls over a four-week experimental period in October–November 2024. Key variables include the total weight of food waste collected, the number of plates sampled, average waste per plate, treatment assignment, collection time, and weekday indicators. The associated research manuscript is currently under review.The field experiment was planned for 20 weekdays across two dining facilities (40 observations). Due to scheduling constraints and assistant availability on three days, three observations were not collected. The final dataset therefore contains 37 observations.