difference-in-differences

Generative AI adoption was linked to higher homework scores but lower unaided exams in a 26,811-student panel

David Strömberg, Victor Lei, Yanhui Wu

CEPR Discussion Paper No. 21577

A CEPR discussion paper analyzes 30 months of records from 26,811 Chinese students in Grades 7–12. Its difference-in-differences estimates associate generative-AI adoption with homework scores 18% higher and completion time 30% lower, but with substantial declines on closed-book and entrance examinations.