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This article critically reviews the use of discursive approaches in studies of sustainable energy transitions. The review is motivated by calls to further incorporate social scientific methodologies into energy research and assess their contribution to policy. We strive to answer three questions: (1) which discursive approaches have been used to study sustainable energy transitions; (2) what thematic topics and issue areas have been covered and (3) what is the added value of discursive research designs? Our analysis is based on a review of 77 articles from the years 2004–2016. Our findings show that discursive approaches were mostly used to analyse institutional change and policy strategies at the national level and to examine energy choices through political ideology and the perceptions of publics. Nuclear power received most coverage, while renewable energy technologies were mainly studied through conflicts and opposition. We demonstrate discursive research designs to examine four distinct policy areas and discuss the added value of these approaches for energy policy and research. Discursive methodologies enable scholars to enrich policy discussions through accounting for transitions as complex and dynamic processes of change. ; Peer reviewed

The Energy Union, a major energy sector reform project launched by the European Commission in 2015, has substantial clean energy and climate aims. However, scholarly caution has been raised about their feasibility, especially with regards to accommodating climate objectives with other closely related yet often competing policy goals. We therefore investigate the policy priorities of the Energy Union by performing a topic modelling analysis of over 5,000 policy documents. A big data analysis confirms that decarbonisation and energy efficiency dimensions are major building blocks in the Energy Union's agenda. Furthermore, there are signals of policy convergence in terms of climate security and climate affordability policies. However, our analysis also suggests that the Commission is not actively prescribing trajectories for renewable energy development or paying close attention to declining incumbent energy generation technologies. Overall, we find that the Energy Union is not a 'floating signifier' but rather has a clear and incrementally evolving decarbonisation agenda. Whether it further develops into an active driver of decarbonisation will largely be determined by the implementation phase of the project. ; Peer reviewed