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Purpose: The purpose of the work is to study the approaches to classification of modern business systems from business managers through the prism of making of managerial decisions.

Methodology: The methods of classification, comparative and systemic analysis, induction, deduction, and formalization are used.

Conclusions: As a result of the research, five conceptual approaches to classification of modern business systems are distinguished: organization-oriented, externally-oriented, management-oriented, socially-oriented, and innovations-oriented. Within each of them, various (mutually supplementing) criteria of classification are used, which allow distinguishing a lot of types of modern business systems. In the conditions of the Fourth Industrial Revolution, which includes transition to Industry 4.0, a new classification of modern business systems according to the criteria of their technological mode is offered, and the systems of the mode 3.0 and 4.0 are distinguished. Transition to the new technological mode is connected to additional business risks, which complicates the process of making of managerial decisions.

Originality/value: The performed analysis of classification of modern business systems from business managers showed that all peculiarities of these systems influence the process of making of managerial decisions in them, including the sectorial structure of business environment, size of business systems, sphere in which business systems function, involvement in business environment, internal and external integration of business systems, scale and complexity of business environment, organizational and legal form, business structure and business culture of business systems, types of benefits that they sell, level of legitimacy, responsibility, innovational activity, and technological mode of business systems.

Nobody concerned with political economy can neglect the history of economic doctrines. Structural changes in the economy and society influence economic thinking and, conversely, innovative thought structures and attitudes have almost always forced economic institutions and modes of behaviour to adjust. We learn from the history of economic doctrines how a particular theory emerged and whether, and in which environment, it could take root. We can see how a school evolves out of a common methodological perception and similar techniques of analysis, and how it has to establish itself. The interaction between unresolved problems on the one hand, and the search for better solutions or explanations on the other, leads to a change in paradigma and to the formation of new lines of reasoning. As long as the real world is subject to progress and change scientific search for explanation must out of necessity continue.

The purpose of the article is to provide further evidence for the work environment hypothesis. According to the work environment hypothesis and as documented by empirical evidence, organizational factors play a crucial role in the development of workplace bullying. However, to better understand and prevent bullying at work and establish sustainable, responsible and ethical workplaces, it is crucial to understand which organizational factors are particularly important in the development of bullying and how these factors, independently and combined, act as precursors to bullying over time. One prominent theory that explains how organizational and individual factors interact is the affective events theory (AET).

In a two-wave, time-lagged study (N = 364), the authors apply AET to test and explain the interplay of organizational factors in the development of bullying at work.

The results revealed that supportive and fair leadership moderates the relationship between role stress and exposure to workplace bullying.

Knowledge of the buffering role of supportive and fair leadership practices is important when implementing organizational interventions aimed at preventing bullying at work.

Although previous studies have shown the general protecting effects of supportive leadership on exposure to bullying, the current study indicates that high level of supportive and fair leadership practices decreases the level of exposure to bullying, even when role ambiguity and role conflict are relatively high.

It is demonstrated that the Austrian school in economics had very different ideas about the creation and change of social institutions and especially about the relation of state and market, which is still one of the fundamental problems of economic theory. Menger′s fundamental distinction of pragmatic and organic institutions and Wieser′s contrary model are discussed, followed by the “impossibility theorem” of Mises and the contrary position of Schumpeter. Hayek′s liberation model of society is presented and criticised, and finally Menger′s position is interpreted as one of moderate liberal interventionism.