> How many times has Brown taken these actions in response to other work by their staff? Surely quite a few Brown papers must have had shoddy methodology.

I'm not sure it's appropriate to limit such a question to Brown. It would be great to know how often shoddy studies are published, the types of errors / malpractice, in which fields, in which journals, how often they're caught, and how that's handled by journals, authors and the institutions that employ them. Perhaps you could do a meta-study and report back.