Sharing R&D investments in breakthrough technologies to control climate change
研究了国家间在突破性技术研发上合作作为减排替代方案，通过三阶段博弈分析合作范围，发现当边际损害足够大且技术溢出不显著时，大联盟稳定。
This paper examines international cooperation on technological development as an alternative to international cooperation on GHG emission reductions. In order to analyze the scope of cooperation, a three-stage technology agreement formation game is solved. First, countries decide whether or not to sign up to the agreement. Then, in the second stage, the signatories (playing together) and the non-signatories (playing individually) select their investment in R&D. In this stage, it is assumed that the signatories not only coordinate their levels of R&D investment but also pool their R&D efforts to fully internalize the spillovers of their investment in innovation. Finally, in the third stage, each country decides non-cooperatively upon its level of energy production. Emissions depend on the decisions made regarding investment and production. If a country decides to develop a breakthrough technology in the second stage, its emissions will be zero in the third stage. For linear environmental damages and quadratic investment costs, the grand coalition is stable if marginal damages are large enough to justify the development of a breakthrough technology that eliminates emissions completely, and if technology spillovers are not very important.