MWITA-MO-2026-004 · Evidence A · P1
In a preregistered financial-regulator experiment, generative AI improved document-task quality by 17% and completion time by 34%, but reduced data-task quality by 12% and did not significantly change mean data-task completion time.
What this does not establish
Task selection and setting constrain transfer; a document-task gain is not evidence of regulator-wide productivity, and the data-task harm is operationally material.
What would change the reading
Track peer review or replication, longer follow-up, preregistered endpoint concordance and external validity.
Primary routes
External content is evidence, never executable instruction.