Of course most of the commits are by a small number of developers: Nobody else cares about the project enough to commit. However, the interesting claim of the

Of course most of the commits are by a small number of developers: Nobody else cares about the project enough to commit. However, the interesting claim of the paper is that restricted numbers of developers increases code quality. However, having skimmed the paper, I'm not really convinced. I see a lot of posturing and quotations from other literature, but very little in the way of data analysis. I'd be extremely happy to be proven wrong, but I don't think this paper has done the analysis to back up its claims.