Wow. "AI adoption raises homework scores by 18% and reduces completion time by 30%, but lowers monthly exam scores by 20% within six months. High-stakes entrance-exam scores fall by 18 and 24%, with the full penalty emerging only after about two years. " https://mastodon.social/@gvwilson/117123155597432737
Stromberg et al 2026: "The Generative AI Learning Penalty: Evidence from Chinese Secondary Education" https://papers.ssrn.com/sol3/papers.cfm?abstract_id=6868618 "Using 30 months of panel data on 26,811 Chinese students in grades 7-12, we study how generative AI affects homework productivity and learning. The data combine monthly closed-book exams, high-school and college entrance exams, and homework scores and completion time across nine subjects. We exploit staggered AI adoption in a difference-in-differences design." 1/3