Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
We consider the formation of an international environmental agreement focusing on adaptation to climate change. Members of the agreement fully share their knowledge and determine their investments in R&D by maximizing their joint welfare, while non-members optimize their individual payoffs. Using a three-stage game formalism, we obtain that a large coalition is achievable and that total emissions increase with the size of the agreement. The welfare implications are parameter dependent.