“…With the aim of cross-country comparison, the International Energy Agency (IEA – International Energy Agency, 2020) and the European Commission’s Joint Research Center (Boza-Kiss et al , 2020; Bertoldi and Boza-Kiss, 2017) publish regular reviews of market developments. Largely, these reviews focus on the more advanced services like energy performance contracting (Pätäri and Sinkkonen, 2014; Polzin et al , 2016; Laurenz and Warneke, 2014), energy service companies (Bertoldi et al , 2006; Boza-Kiss et al , 2017; Marino et al , 2011; Vine, 2005), advanced services through digitalization (Kjeang et al , 2017b) or sectorial reviews (Labanca et al , 2015; Zaunbrecher et al , 2021). National reviews are available for the USA (Stuart et al , 2014; Larsen et al , 2012), Russia (Roshchanka and Evans, 2016), the UK (Nolden et al , 2016) and France (Duplessis et al , 2012).…”