The Determinants of Output Per Contributor in Open Source Projects : An Empirical Examination

Using a unique data set we empirically examine which factors explain output per contributor in open source projects. We find that the output per contributor of open source programs is much higher when licenses are less restrictive. Further examination suggests that the difference in output per contributor is in large part due to many more contributors for projects that employ restrictive licenses. The results suggest a status/signaling or ideological motivation for participation in open source projects with restrictive licenses