Online First Review of Economic Studies Online 20 Feb 2026Do The Effects of Nudges Persist? Theory and Evidence from 38 Natural Field ExperimentsAlec Brandon · Paul J Ferraro · John A List · Robert D Metcalfe · Michael K Price · Florian RundhammerThis paper asks why the Home Energy Report (HER) — a widely deployed social-comparison nudge that shows households how their electricity consumption compares to their neighbors — produces behavioral …