Jason Clark, a postdoc at the Institute for Cognitive Science at the University of Osnabrueck, writes:
It seems clear that philosophers co-author papers far less often than scientists do, but while there has been some discussion on your blog as to the market value of co-authored works, I haven't found any mention of comparative data on co-authorship rates by discipline (not to mention the potential significance of such differences). Do you know of any such research, or could you post this question for comments?
Thoughts/information from readers?