“…We applied this "research method in the study of the economic development of Russia in the imperial, Soviet and modern historical periods" (Savelyev et al, 2020b, p. 20), together with https://doi.org/ 10. 15405/epsbs.2021.09.02.93 Corresponding Author: M. S. Kozyrev Selection and peer-review under responsibility of the Organizing Committee of the conference eISSN: 2357-1330 821 factorial and functional analysis, it was applied in relation to the study of the quality of governance of the post-Soviet governments of Russia (Savelyev et al, 2021c), as well as in a comparative analysis of Germanspeaking (Savelyev et al, 2020b), French-speaking (Savelyev et al, 2021b), Portuguese-speaking (Savelyev et al, 2021b) and newly industrialized countries (Savelyev et al, 2021d). The data sources were: data up to 2008 -Angus Maddison Historical Statistics database (Maddison, 2008), From 2009 to 2019 -The Conference Board, Total Economy Database (TED, 2021).…”