International collaborations in green energy technologies: what is the role of distance in environmental policy stringency?

This paper investigates the intensity of international collaborations in energy-related technologies across OECD and BRIICS countries, by disentangling the role of the distance in environmental policy stringency between countries, controlling for the more traditional measures of technological, social, institutional and geographical distance. In doing so, it distinguishes between the stringency in demand-pull and the stringency in technology-push policy instruments. The analysis relies upon an original dataset, with data on patents and co-patents in climate change and mitigation technologies over the period 1995–2014, with a focus on technologies related to energy generation, transmission or distribution. The results show that the distance in the stringency of environmental policy between countries hinders the intensity of technological collaborations in energy-related technologies and this occurs specifically with reference to demand-pull policy instruments. We also find thatwhile the availability of local technological capabilities positively affects the intensity of international collaborations, if two countries are distant in terms of technological development, the co-patenting activity is hindered. Finally, BRIICS countries display a lower ability to participate in international co-patenting activity, particularly so in collaboration with other BRIICS countries