Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Reciprocity can be a powerful motivation for human behaviour. Scholars have argued that it is relevant in the context of private provision of public goods. We examine whether reciprocity can resolve the associated coordination problem. The interaction of reciprocity with cost-sharing is critical. Neither cost-sharing nor reciprocity in isolation can solve the problem, but together they have that potential. We introduce new network notions of reciprocity relations to better understand this.