The purpose of this paper is to illuminate the geographical diffusion of photovoltaic installations in Germany quantitatively and to test if preexisting photovoltaic systems stimulate further installations nearby; thus we investigate to which extent knowledge flows depend on geographic...

The photovoltaic industry acts as a key force in the transition toward a sustainable energy production model. Only a niche market a few years ago, photovoltaic panels and installations are now becoming a mainstream electricity provider. As a highly dynamic, multi-technology and globally...

Interactions between firms, universities, and research organizations are crucial for successful innovation in the modern knowledge-based economy. Systems of such interactions constitute R&D networks. R&D networks may be meaningful segmented using recent methods for identifying communities,...

One of the main goals of the European Research Area (ERA) concept is to improve coherence and integration across the European research landscape by removing barriers for collaborative knowledge production in a European system of innovation. The cornerstone of policy instruments in this context...

The focus of this study is on integration processes in European R&D by analyzing the spatio-temporal dimension of three different R&D collaboration networks across Europe. These networks cover different types of knowledge creation, namely co-patent networks, project based R&D networks within the...

The objective of this study is to explore the determinants of joint knowledge generation within European networks of R&D collaboration. This study distinguishes between two types of joint knowledge generation: scientific and commercially relevant knowledge generation. Joint generation of...

We examine how different renewable energy support policies affect innovation in solar and wind power technologies. The analysis is conducted using policy and patent data for a large sample of 194 countries and territories. The policy data allows distinguishing two dimensions of regulation, i.e....

An overarching concern in regional science is the characterization of interactions-such as commuter flows, transport, migration, or knowledge flows-within and between subnational spatial units. In this work, we use techniques from social network analysis to address the quality, rather than the...

The interpretation and measurement of the innovation performance of territorial units represent well established research areas. Nevertheless the way this issue is usually addressed raises several questions. In present paper we are dealing with two of these problematic fields: the level of...