Abstract. The European Academy of Wind Energy (eawe), representing universities and institutes with a significant wind energy programme in 14 countries, has discussed the long-term research challenges in wind energy. In contrast to research agendas addressing short-to medium-term research activities, this eawe document takes a longer-term perspective, addressing the scientific knowledge base that is required to develop wind energy beyond the applications of today and tomorrow. In other words, this long-term research agenda is driven by problems and curiosity, addressing basic research and fundamental knowledge in 11 research areas, ranging from physics and design to environmental and societal aspects. Because of the very nature of this initiative, this document does not intend to be permanent or complete. It shows the vision of the experts of the eawe, but other views may be possible. We sincerely hope that it will spur an even more intensive discussion worldwide within the wind energy community.

SummaryThis paper proposes a framework for categorising possible interrelations between technological and institutional change and applies this framework to the case of the restructuring of the electricity sector. It is argued that there is a need for coherence between institutions and technological practice, so as to safeguard the satisfactory functioning of electricity infrastructure. The identification of possible incoherences between institutions and technological practice allows for a better understanding of the potential drivers for change and the evolutionary processes of which they may be part. This paper attempts to elaborate the nature of this co-evolution in somewhat more detail, using specific levels of analysis that are exemplified in a four-level model. In the case of the restructuring of the electricity sector, the institutional framework has changed from a public utility-oriented, towards a market-oriented system. However, the technological practice remained unchanged: a system-oriented approach that relies on centralised planning, control and operation. This discrepancy between institutions and technological practice leads to significant frictions in the functioning of the electricity sector, but it also offers opportunities for innovation. In order to make liberalisation a success, it might be necessary to stimulate certain technical developments (i.e distributed generation and intelligent networks).

Sorbonne). Different versions of this paper were presented at various seminars and workshops in Europe and abroad. We are grateful to participants and discussants for their comments and critiques. We are particularly indebted to Richard Green, Carine Staropoli, and two anonymous referees for helpful comments and suggestions. 2 AbstractThis paper is about the alignment of technology and modes of organization in infrastructures in the context of their reform. Since infrastructures are characterized by strong technical complementarities, we explore the resulting 'critical technical functions' that need to be performed in order to guarantee the expected technical performance of the system. We characterize 'critical transactions' as essential to provide adequate support to these functions. We distinguish various modes of organization that can effectively coordinate these critical transactions. We argue that the features of these transactions determine the alignment between organization and technology and should be taken explicitly into account when reforming infrastructures.

This article elaborates on the possible interrelations between the technical and institutional coordination of infrastructures. There is indeed a need for coherence between both in order to safeguard a satisfactory functioning in terms of economic performance, guarantee of public values and technical system integrity. It is argued that the ongoing discussion on the liberalization of various infrastructures focuses very much on institutional changes, including market restructuring towards competition and privatization. The technical repercussions of these institutional changes are often neglected. On the other hand, technological change might also have very fundamental consequences for organizations and institutions. Building on the idea of a co-evolution between institutions and technologies, we define very simplified technical and institutional coordination mechanisms. By comparing both, we are able to determine their coherence and relate this to infrastructure performance. In this way, we provide a novel attempt to relate institutional arrangements to the technical network-specificities of infrastructures. This offers a different perspective on the organization of these sectors and a new explanation of their performance. We illustrate our arguments by way of cases from the electricity and air transport sectors. Implications for theory and policy conclude this article.

No abstract