My recollection is Peopleware lists as an anecdote a Coding War Games study (not alot of data is in the book) where they pit team against team in different work environments, the study is about 30 years old at this point and as far as I know, no one has bothered to either recreate or disprove it. It showed a clear winner in terms of work environments (which was written by one of the book authors so it agreed with the general sentiments of the book.)