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sorry...most of researchers work for university, usually when open a random article, we can presume it is my wrote by a professor.

I hear that in many fields, papers are mostly written by grad students / post-docs. Professor gets their name on for raising the funds and sometimes managing the project, but not a whole lot of actual writing from their hands - any truth to that?

> What percentage of published research is done by a university versus a private entity?

What incentive is there for a private entity to openly publish valuable research in the first place? Except in certain unusual situations (monopoly justification a la Bell Labs, PR, patent applications), I would expect that private entity research results would be kept private by default so the business can maximally exploit it without assisting its competition.

Depends on the field, but 100% is not a bad answer for most non-applied fields.