Given there are thousands of papers written on this over the past half century due to the complexity of human behaviour, I'm not sure you'd be able to fit this into one paper. There are too many topics to discuss. Individual side, organizational side, and then it spiders from there. Cognition and psychology, culture, corporate governance, and much more, it's endless.

But to be simplistic, you could just count the co-authors on all those thousands of papers, take the average, and there's your answer. Draw up histograms along various independent variables if you want a bit more nuance.