“…The concept was first introduced in a study of the historical innovation journeys of instruments for trading environmental emissions permits and for liberalizing network-bound utility services (Voß, 2007a(Voß, , 2007b. It was taken up and more explicitly articulated by Voß and Simons (2014) and studied for other cases of tradable permit systems Simons & Voß, 2015;, experimental sustainability management (Voß, 2014) or social policy (Béland & Howlett, 2016), but also for instruments of political representation and legitimation such as methods of public participation and deliberative democracy (Amelung & Grabner, 2017;Voß & Amelung, 2016). The concept has also been discussed in relation to existing concepts and frameworks, such as innovation networks, regulatory communities, epistemic communities, advocacy coalitions, policy subsystems or networks (Mukherjee & Howlett, 2015;Voß, 2007a, pp.…”