Parliamentary-presidential or presidential-parliamentary republic as modes of one political model or different concepts of government

This research paper deals with the scientific research of institutional-procedural and behavioral attributes, principles and indicators of typology of mixed-type republics in European countries. The conducted scientific analysis gives grounds to argue that the defining directions in this context are the appeal to the problems of formation and activity of governments and the possibility of dissolving parliaments (ie scientific institutional and procedural differentiation of hybrid republican forms), dualism, legality and responsibility of executive bodies, as well as the index of presidential powers and the peculiarities of the dualism of the executive branch