On the basis of the secondary analysis of data of the sociological pool of experts, we have defined the civilizational "western estern" economico mental ambivalence of Ukraine's population. It is emphasized that this con firms, on the whole, the hypothesis on the middle localization of the eco nomic mentality of the Ukrainians in the framework of the binary opposition "West"/"East". The positions of experts testify also to the social legitimacy of private property among the Ukrainian people. By this index, their eco nomic mentality cn be localized closer to the "western", rather than the "eastern" pol;e of the civilizational dichotomy.

This article explores the sources of legitimacy of private property in the means of production in Ukraine. The conceptualization of legitimacy of private property was made by analyzing theoretical approaches to the study of the foundations of private property relations in Western countries. The application of these approaches tests economic utilitarian, psychological, and sociocultural explanations of legitimacy of large and small private enterprises and private land in the process of activation of post-communist transition of Ukrainian society. The basic hypothesis was that the process of legitimation of private property in the means of production proceeds by uniting utilitarian and psychological adaptation with sociocultural agreement of ideological attitudes. This hypothesis was verified with the help of created legitimacy indices by comparison of linear regressions and data of the Institute of Sociology of the National Academy of Sciences (NAS) of Ukraine for 2013 and 2017. The results indicate that the hypothesis has been held true only concerning legitimacy of small private enterprises. They have acquired a moderate extent of legitimacy owing to the fact that besides the factors of adaptation, social recognition has increased at the expense of people who support the multiparty system and the liberal and mixed methods of regulation of the economy. In contrast, the existence of large private enterprises and private land has not acquired the corresponding sociocultural foundation.

The origins and content of the methodology of scientific research programs of I. Lakatos are considered taking into account the problems and tasks of the history of sociology. The reception of the methodology of research programs in sociology can be explained by the relevance of the analytical model of the structure and dynamics of the research program in the analysis of sociological knowledge. Within the framework of sociological knowledge, metatheoretical, theoretical and empirical structural levels are analytically distinguished. Certain structural analogies are observed: between the “hard core” and “negative heuristics” of the research program, on the one hand, and metatheory, on the other; between the “protective belt” and the “positive heuristic” of the research program, on the one hand, and theory, on the other; between the empirical content of the research program, on the one hand, and the empirical basis of sociology, on the other. One can observe a number of analogies in the dynamics of functional connections between the structural components of the research program, on the one hand, and the dynamics of functional connections between metatheorizing, theorizing, and empirical analysis in sociology, on the other.

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