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While experimentation is at the heart of sustainability transitions, little attention has been paid to policy experimentation and its effects in advancing transitions. Drawing on the literatures on policy experimentation and institutional change in the context of sustainability transitions, we analyse an in-depth case study of the development of Mobility as a Service (MaaS) in Finland – one of the first countries globally to advance MaaS by government support. Our findings show how a potentially disruptive innovation, MaaS, can be traced back to a longer process of administrative reorientation and restructuring, i.e. gradual transformation in institutions, and has benefitted from cycles of policy experimentation, combined with the sequencing of policy strategies and further changes in the policy mix. Administrative restructuring has enabled policy experimentation that has led - via new vision building, networking and learning - to major regulatory change allowing market creation for MaaS. We conclude that the dynamics of policy mixes in transitions are influenced by short-term policy experimentation and long-term institutional change. More generally, institutional change is vital for enabling a favourable context for policy experimentation in sustainability transitions that in turn provides cognitive and normative learning to inform further institutional change.

Highlights • Focus on policy experimentation and institutional change in transitions. • Two types of policy experiments identified in relation to innovation policy. • An in-depth case study of mobility as a service (MaaS) in Finland is presented. • Institutional change enables conducive context for policy experimentation. • Learning from policy experimentation can push transformative institutional change. ; While experimentation is at the heart of sustainability transitions, little attention has been paid to policy experimentation and its effects in advancing transitions. Drawing on the literatures on policy experimentation and institutional change in the context of sustainability transitions, we analyse an in-depth case study of the development of Mobility as a Service (MaaS) in Finland – one of the first countries globally to advance MaaS by government support. Our findings show how a potentially disruptive innovation, MaaS, can be traced back to a longer process of administrative reorientation and restructuring, i.e. gradual transformation in institutions, and has benefitted from cycles of policy experimentation, combined with the sequencing of policy strategies and further changes in the policy mix. Administrative restructuring has enabled policy experimentation that has led - via new vision building, networking and learning - to major regulatory change allowing market creation for MaaS. We conclude that the dynamics of policy mixes in transitions are influenced by short-term policy experimentation and long-term institutional change. More generally, institutional change is vital for enabling a favourable context for policy experimentation in sustainability transitions that in turn provides cognitive and normative learning to inform further institutional change.

The energy sector plays a significant role in reaching the ambitious climate policy target of limiting the global temperature increase to well below 2°C. To this end, technological change has to be redirected and accelerated in the direction of zero-carbon solutions. Given the urgency and magnitude of the climate change challenge it has been argued that this calls for a policy mix which simultaneously supports low-carbon solutions and also deliberately drives the discontinuation of the established technological regime. Yet, the effect of such phase-out policies on the development and diffusion of low-carbon technologies has received little attention in empirical research so far. This paper addresses this gap by taking the case of the transition of the German electricity generation system towards renewable energies – the so-called Ener-giewende. Based on a survey of innovation activities of German manufacturers of renewable power gener-ation technologies conducted in 2014 it explores the impact such destabilization policies – most prominent-ly Germany's nuclear phase-out policy – may have on technological change in renewable energies. By drawing on descriptive statistics and combining insights from earlier regression analyses we find evidence that Germany's nuclear phase-out policy had a positive influence on manufacturers' innovation expendi-tures for renewable energies and was seen as the by far most influential policy instrument for the further expansion of renewable energies in Germany. The insights resulting from our explorative analysis have important implications for the literature on policy mixes and sustainability transitions regarding the 'flip sides' to innovation and the crucial importance of destabilization policies for unleashing 'destructive crea-tion'. We close by discussing policy repercussions for ongoing debates on policies for accelerating the phase-out of coal to meet climate change targets.

Reaching a better understanding of the policies and politics of transitions presents a main agenda item in the emerging field of sustainability transitions. One important requirement for these transitions, such as the move towards a decarbonized energy system, is the redirection and acceleration of technological change, for which policies play a key role. In this regard, several studies have argued for the need to combine different policy instruments in so-called policy mixes. However, existing policy mix studies often fall short of reflecting the complexity and dynamics of actual policy mixes, the underlying politics and the evaluation of their impacts. In this paper we take a first step towards an extended, interdisciplinary policy mix concept based on a review of the bodies of literature on innovation studies, environmental economics and policy analysis. The concept introduces a clear terminology and consists of the three building blocks elements, policy processes and characteristics, which can be delineated by several dimensions. Based on this, we discuss its application as analytical framework for empirical studies analyzing the impact of the policy mix on technological change. Throughout the paper we illustrate the proposed concept by using the example of the policy mix for fostering the transition of the German energy system to renewable power generation technologies. Finally, we derive policy implications and suggest avenues for future research.

Reaching a better understanding of the politics and policies of transitions presents a main agenda item in the emerging field of sustainability transitions. One important requirement for these transitions, such as the move towards a decarbonized energy system, is the redirection and acceleration of technological change, for which policies play a key role. Several studies of policies supporting environmental technological change have argued for the need to combine different policy instruments in so-called policy mixes. However, existing policy mix studies often fall short of reflecting the complexity and dynamics of actual policy mixes, and they lack a common terminology. In this paper we take a first step towards a more comprehensive policy mix concept for environmental technological change based on a review of the bodies of literature on innovation studies, environmental economics and policy analysis. The concept we develop consists of the three building blocks elements, processes and dimensions and introduces a clear terminology, which is particularly important for the characteristics of such a policy mix, including the consistency of its elements and the coherence of its processes. Throughout the paper, we illustrate the concept using the example of the policy mix for fostering the transition of the German energy system to renewable power generation technologies. We argue that the proposed concept provides an interdisciplinary analytical framework for empirical studies analyzing the impact of the policy mix on environmental technological change and may thereby contribute to reaching a better understanding of the politics and policies of sustainability transitions. Finally, we derive policy implications and suggest avenues for future research.

In this paper, we conduct a cross-country quantitative analysis of the replacement incentives generated by the EU ETS for the power sector in 2008-12. In order to do so, the allocation rules of the Member States are applied to concrete reference power plants for three different fuel types (lignite, hard coal and gas). Based on these calculations, we compare installation-specific replacement in-centives across the Member States. Our analysis shows that replacement incentives vary significantly across Member States and typically deviate from the incentives provided in the reference case of full auctioning. Furthermore, the EU ETS allocation rules lead to perverse incentives in approximately 30% of the possible replacement options. Only 5 MS do not provide any perverse incentives. Finally, we explore the link between replacement incentives and allocation types. Based on our findings, we derive policy recommendations for the design of emission trading schemes emerging around the world.