“…Of course, talking about behaviourism (in both its stages) it is necessary to mention the systemic approach of David Easton (1917Easton ( -2014, who introduced the concept of political system as a set of interactions through which valued things are distributed in society (Easton, 1965). It seems that a similar approach can be applied to the concept of economic system, especially if we are talking about the international economic system, which has very close internal connections with the political system (Sharov, 2021). These questions are described in sufficient detail in numerous scientific works on research methodology, and therefore we will highlight only one of them (which considers different approaches), namely the book Designing Social Research (2000) by N. Blaikie.…”