Rethinking Nudge: An Information-Costs Theory of Default Rules

Omri Ben-Shahar

Abstract

Policymakers and scholars – both lawyers and economists – have long been pondering the optimal design of default rules. From the classic works on “mimicking” defaults for contracts and corporations to the modern rush to set “sticky” default rules to promote policies as diverse as organ donations, retirement savings, consumer protection, and data privacy, the optimal design of default rules has featured as a central regulatory challenge. The key element driving the design is opt-out costs—how to