Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Employing a model of knowledge spillovers, we find empirical evidence consistent with both direct and indirect spillovers among open source software projects. We further find that programmers who work on many other projects have a positive effect on the success of a project beyond the effect they have on connectivity of the network. We also find that, both “modifications” and “additions” are positively associated with project success.