We analyze the evolution of the international collaboration network in photovoltaic research. Using data on scientific … publications for the period 1980-2015, we apply social network analysis to trace the evolution of the global network of countries … steady increase of publications and collaboration within the global research network. While there is a small group of …

observed from 1985 to 2013, in 13 German regions. We find that the initiative increases network size and innovation activities … during the funding period but not afterwards. The impact of the BioRegio contest on network cohesion is moderate. In contrast …