“…This can be explained by a large number of country-specific variables that were not taken into account in our model. Important determinants are, for example, traffic density, energy intensity (Chen & Mkumbo, 2020;Xiaoyang, Kanaado, & Epadile, 2022) industry in proportion to GDP (Neenu & Nishad, 2021) transaction costs (Salim, Xavera, Ricado, Paul, & Christian, 2023) and the type of power generation. Even within the group of industrialized countries, it is obvious that there are notable differences, though income, the degree of democracy, and economic freedom are comparable.…”