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The ambition of energy policy has long been to reduce carbon emissions, secure energy supply and provide affordable energy services. In recent years an increasing number of policy instruments has been introduced to promote energy efficiency across the EU. While previous research has analysed the effectiveness of individual policy instruments and their impact on the diffusion of particular energy efficient technologies or practices, our analysis takes a broader view and examines the mix of existing policies aimed at stimulating reductions in energy use. The empirical focus of the paper is on policy goals and instruments aimed at stimulating energy efficiency in buildings in Finland and the United Kingdom. We trace the development of the policy mixes during 2000- 2014 and analyse their emerging overall characteristics. The analysis is based on a mapping of policy goals and instruments, documentary analysis and semi-structured interviews with stakeholders. We find that both countries have increasingly complex policy mixes, encompassing a variety of goals and instruments and make use of a range of different instrument types to encourage users to reduce energy consumption. Despite the shared EU influence, the way in which the policy mixes have evolved in both countries were found to be quite different.

The ways in which institutions are reconfigured to change mainstream selection pressures to favour sustainability is central to research on sustainability transitions but has only recently begun to receive more attention. Of this existing work, empirical attention has mainly focused on the national level with less attention to local dynamics. Attending to this gap, we mobilise theory on institutionalisation processes and insights from the politics of transitions literature and take an actor perspective to investigate the agency of local sustainability initiatives to navigate local governance processes and reconfigure selection environments at the urban scale. Our work subsequently demonstrates the importance of diverse actor tactics, of networking for advocacy and of networking for the creation of informal, ad hoc governance arenas.

Cities raise major challenges and opportunities for achieving sustainability. Much literature on urban sustainability focuses on specific aspects such as planning practices, urban policy or the diffusion of more sustainable technologies or practices. However, attempts at understanding the mechanisms of structural change towards sustainability have resulted in the emergence of an interdisciplinary field of sustainability transitions research. Transitions research has developed a phase model of transitions in which predevelopment, take-off, acceleration and stabilization phases are distinguished. However, the acceleration phase has received limited attention so far. This is a crucial gap as policy makers are keen to accelerate transitions. This paper aims to enhance our understanding of how local actions contribute towards accelerating urban sustainability transitions. It does so by testing an acceleration mechanisms framework through exploring the collective agency of local initiatives in urban sustainability transitions. Drawing on a case study of the city of Brighton & Hove (UK), the paper finds that despite favourable local political conditions, there is a lack of evidence of acceleration apart from in individual domains such as food or mobility. Progress is found to depend on the agency of initiatives to both scale up sustainable practices and embed these practices into local governance arrangements.

This paper engages with recent research concerning the roles of niche spaces in the strategic management of sustainable innovations. Whilst a growing body of empirical investigation looks to developments within these spaces, it is surprising how little pauses to consider how the spaces themselves develop over time, what constitutes these spaces, and how their characteristics influence sustainable innovation. We explore such questions through a case study into the history of solar photovoltaic electricity generation over the last 40 years in the UK. Whilst we see evidence consistent with recent ideas about niche spaces shielding, nurturing, and empowering sustainable innovation, the main thrust of our analysis concludes that this arises in contested and compromised ways. Moreover, our analysis identifies niche space developing through the political ability of technology advocates recursively interpreting, representing, and negotiating between the content and contexts of innovation.

Offshore wind technology has recently undergone rapid deployment in the UK. And yet, up until recently, the UK was considered a laggard in terms of deploying renewable energy. How can this burst of offshore wind activity be explained? An economic analysis would seek signs for newfound competitiveness for offshore wind in energy markets. A policy analysis would highlight renewable energy policy developments and assess their contribution to economic prospects of offshore wind. However, neither perspective sheds sufficient light on the advocacy of the actors involved in the development and deployment of the technology. Without an account of technology politics it is hard to explain continuing policy support despite rising costs. By analysing the actor networks and narratives underpinning policy support for offshore wind, we explain how a fairly effective protective space was constructed through the enroling of key political and economic interests.

This is the final version of the article. Available from Mary Ann Liebert via the DOI in this record. ; City-regions as sites of sustainability transitions have remained under-explored so far. With our comparative analysis of five diverse European city-regions, we offer new insights on contemporary sustainability transitions at the urban level. In a similar vein, the pre-development and the take-off phase of sustainability transitions have been studied in depth while the acceleration phase remains a research gap. We address this research gap by exploring how transitions can move beyond the seeding of alternative experiments and the activation of civil society initiatives. This raises the question of what commonalities and differences can be found between urban sustainability transitions. In our explorative study, we employ a newly developed framework of the acceleration mechanisms of sustainability transitions. We offer new insights on the multi-phase model of sustainability transitions. Our findings illustrate that there are no clear demarcations between the phases of transitions. From the perspective of city-regions, we rather found dynamics of acceleration, deceleration, and stagnation to unfold in parallel. We observed several transitions—transitions towards both sustainability and un-sustainability—to co-evolve. This suggests that the politics of persistence—the inertia and path dependencies of un-sustainability—should be considered in the study of urban sustainability transitions. ; The article is based on research carried out as part of the ARTS project (Accelerating and Rescaling Transitions to Sustainability) funded under the European Framework Programme for Research and Innovation under the grant agreement 603654. Although the authors take full responsibility for the paper, it is based on valuable contributions and comments from the whole ARTS consortia, including Andreas Blum, Kristin Reiß, Gordon MacKerron, Rachael Durrant, Erika Meynaerts, Magnus Tuvendal, My Svensdotter, Maria Schewenius, Nikolina Oreskovic, Giorgia Silvestri, Matthew Bach, Felix Spira, Derk Loorbach and Steffen Maschmeyer. We would also like to thank all of our respondents for giving up their valuable time to engage in interviews and workshops to make this research possible. We thank the anonymous reviewers for comments and constructive critique on an earlier version of this paper. The content of the paper does not necessarily reflect the opinion of the European Commission.

This paper aims to make two contributions to the sustainability transitions literature, in particular the Geels and Schot (2007) transition pathways typology. First, it reformulates and differentiates the typology through the lens of endogenous enactment, identifying the main patterns for actors, formal institutions, and technologies. Second, it suggests that transitions may shift between pathways, depending on struggles over technology deployment and institutions. Both contributions are demonstrated with a comparative analysis of unfolding low-carbon electricity transitions in Germany and the UK between 1990-2014. The analysis shows that Germany is on a substitution pathway, enacted by new entrants deploying small-scale renewable electricity technologies (RETs), while the UK is on a transformation pathway, enacted by incumbent actors deploying large-scale RETs. Further analysis shows that the German transition has recently shifted from a '˜stretch-and-transform'™ substitution pathway to a '˜fit-and-conform'™ pathway, because of a fightback from utilities and altered institutions. It also shows that the UK transition moved from moderate to substantial incumbent reorientation, as government policies became stronger. Recent policy changes, however, substantially downscaled UK renewables support, which is likely to shift the transition back to weaker reorientation.

City-regions as sites of sustainability transitions have remained under-explored so far. With our comparative analysis of five diverse European city-regions, we offer new insights on contemporary sustainability transitions at the urban level. In a similar vein, the pre-development and the take-off phase of sustainability transitions have been studied in depth while the acceleration phase remains a research gap. We address this research gap by exploring how transitions can move beyond the seeding of alternative experiments and the activation of civil society initiatives. This raises the question of what commonalities and differences can be found between urban sustainability transitions. In our explorative study, we employ a newly developed framework of the acceleration mechanisms of sustainability transitions. We offer new insights on the multi-phase model of sustainability transitions. Our findings illustrate that there are no clear demarcations between the phases of transitions. From the perspective of city-regions, we rather found dynamics of acceleration, deceleration, and stagnation to unfold in parallel. We observed several transitions-transitions towards both sustainability and un-sustainability-to co-evolve. This suggests that the politics of persistence-the inertia and path dependencies of un-sustainability-should be considered in the study of urban sustainability transitions.

Decades of techno-economic energy policymaking and research have meant evidence from the Social Sciences and Humanities (SSH)—including critical reflections on what changing a society's relation to energy (efficiency) even means—have been underutilised. In particular, (i) the SSH have too often been sidelined and/or narrowly pigeonholed by policymakers, funders, and other decision-makers when driving research agendas, and (ii) the setting of SSH-focused research agendas has not historically embedded inclusive and deliberative processes. The aim of this paper is to address these gaps through the production of a research agenda outlining future SSH research priorities for energy efficiency. A Horizon Scanning exercise was run, which sought to identify 100 priority SSH questions for energy efficiency research. This exercise included 152 researchers with prior SSH expertise on energy efficiency, who together spanned 62 (sub-)disciplines of SSH, 23 countries, and a full range of career stages. The resultant questions were inductively clustered into seven themes as follows: (1) Citizenship, engagement and knowledge exchange in relation to energy efficiency; (2) Energy efficiency in relation to equity, justice, poverty and vulnerability; (3) Energy efficiency in relation to everyday life and practices of energy consumption and production; (4) Framing, defining and measuring energy efficiency; (5) Governance, policy and political issues around energy efficiency; (6) Roles of economic systems, supply chains and financial mechanisms in improving energy efficiency; and (7) The interactions, unintended consequences and rebound effects of energy efficiency interventions. Given the consistent centrality of energy efficiency in policy programmes, this paper highlights that well-developed SSH approaches are ready to be mobilised to contribute to the development, and/or to understand the implications, of energy efficiency measures and governance solutions. Implicitly, it also emphasises the heterogeneity of SSH policy evidence ...

Fast and reliable detection of patients with severe and heterogeneous illnesses is a major goal of precision medicine. Patients with leukaemia can be identified using machine learning on the basis of their blood transcriptomes. However, there is an increasing divide between what is technically possible and what is allowed, because of privacy legislation. Here, to facilitate the integration of any medical data from any data owner worldwide without violating privacy laws, we introduce Swarm Learning—a decentralized machine-learning approach that unites edge computing, blockchain-based peer-to-peer networking and coordination while maintaining confidentiality without the need for a central coordinator, thereby going beyond federated learning. To illustrate the feasibility of using Swarm Learning to develop disease classifiers using distributed data, we chose four use cases of heterogeneous diseases (COVID-19, tuberculosis, leukaemia and lung pathologies). With more than 16,400 blood transcriptomes derived from 127 clinical studies with non-uniform distributions of cases and controls and substantial study biases, as well as more than 95,000 chest X-ray images, we show that Swarm Learning classifiers outperform those developed at individual sites. In addition, Swarm Learning completely fulfils local confidentiality regulations by design. We believe that this approach will notably accelerate the introduction of precision medicine.