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Purpose -The purpose of this paper is to point out the necessity of implementing more appropriate approaches instead of the traditional single disciplinary approaches, in order to be able to cope with the ill-defined, highly complex problem of sustainable development in systems such as organizations or regions. Design/methodology/approach -Based on empirical data concerning expert and stakeholder preferences, it is argued that research and teaching on innovation for sustainability need to be both inter-and transdisciplinary. Findings -Here, the approach of transdisciplinary case studies, developed at the Swiss Federal Institute of Technology (ETH) in Zurich, allows appropriate integration of research and teaching activities and thus leads to mutual learning between the case study actors. Practical implications -In the second part of the paper, these conceptual considerations are illustrated with the so-called Erzherzog Johann case study, an integrative research and teaching project at the University of Graz. Originality/value -In the paper the very complex task to integrate research and teaching on sustainability-related innovation is described and illustrated with the first transdisciplinary case-study conducted in Austria according to the ETH approach.

This paper aims to identify the success factors, incentives, barriers and challenges in the adoption process of photovoltaics (PV) in the agricultural sector, with particular focus placed on decision making of individual farmers and network effects. We investigated a successful case of an Austrian farmers' association that set up a community power plant concept and a society for facilitating PV adoption among farmers. We found that PV adoption decisions are driven by economic and environmental considerations and that while ethical considerations are relatively strong among farmers, they cannot be used as predictors in the decision making process. Results furthermore suggest that while adoption of PV increases belief in technological progress as a solution to environmental problems, it may simultaneously lead to a weakening in the belief that underlying lifestyle changes are necessary. Our conclusions address crucial aspects of PV adoption in agriculture, and implications for policy measures related to respective community initiatives.

Summary Closing loops by intercompany recycling of by‐products is a core theme of industrial ecology (IE). This article considers whether industrial recycling networks or industrial symbiosis projects can be used as a starting point for much broader intercompany cooperation for sustainable development. Evidence presented is based on the results of an empirical investigation of the recycling network Styria in Austria, the recycling network Oldenburger Münsterland in Germany, and the manufacturing sector in Austria. Statistical analysis shows that the percentage of by‐products that are passed on to other companies for recycling purposes is not higher in member companies of the recycling networks than in the other companies of the manufacturing sector in Austria. In terms of cooperation, the relationships with the respective recycling partners are found to be very similar to regular customer relations. Furthermore, the companies of the recycling networks remain unaware of the network to which they belong. Instead, one of the main findings of this study is that intercompany recycling activities are regarded by the company representatives as bilateral market transactions, not as collaborative network activities. This has potentially significant implications for the use of industrial symbiosis networks as starting points for sustainability networks with broader cooperation toward sustainability. The findings raise interesting questions as to whether such broader cooperation might result from a conscious planning process or might emerge largely spontaneously as part of normal market coordination. In any case, intercompany recycling is clearly considered to be a very important field of collaborative action for sustainability in industry.

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