“…Apart from Nyga-Łukaszewska and Chilimoniuk-Przeździecka [2017], such an approach has been rare. Additionally, this paper investigates the sample of the EU NMS while existing studies focused on specific countries like Azerbaijan [Falkowski, 2018], Germany [McKinsey, 2009;Bilan et al, 2017], the Netherlands [Berk et al, 2006], Pakistan [Nawaz and Alvi, 2018], Poland [Nyga-Łukaszewska, 2016], Serbia [Katic et al, 2016], or their groups: Europe in general [Zachmann and Cipollone, 2013], low-income countries [Scott, 2013], or the world's biggest energy consumers [Nyga-Łukaszewska and Chilimoniuk-Przeździecka, 2017] or energy exporters [Nyga-Łukaszewska and Napiórkowski, 2022]. The sample of countries used in the present study is to some extent similar to that used in the study of Głowacka [1996], who was analyzing the group of Central and Eastern European economies in transition.…”