Suspecting AI cheating, Ivy League prof ordered in-person final; scores fell 50%

Brown University economics professor Roberto Serrano transitioned take-home exams to in-person testing after midterm averages rose from a historical 65-80% to 96%. Following the shift to proctored exams to mitigate suspected LLM usage, student scores dropped by 50%, suggesting significant reliance on generative AI for take-home assignments.