Diversity’s Science‑Impact Link Is Weak

A pre‑registered scoping review of over 100 papers finds only about 15–28% of reported results support the claim that diversity improves scientific output or impact; disciplinary (informational) diversity may be an exception, but demographic diversity shows little robust positive effect. The finding is reported and amplified in a public‑facing academic blog (Alex Tabarrok) as a challenge to the common motto 'diversity is our strength.' — If sustained, this evidence shifts debates over university hiring, funding priorities and DEI programs from axiomatic moral claims toward evidence‑based evaluation of when and which kinds of diversity actually improve research.