Abstract
The scientific literature presents various definitions of the concepts of ‘regionalism’, ‘regionalization’ and ‘interregional interaction’. The processes associated with globalization and integration manifest themselves in the form of consolidation of macro-regional ties. The formation of big macroeconomic zones of priority cooperation covers neighbouring and geographically close countries. The consolidation of large economic spaces is accompanied by the creation of regional economic organizations and integration communities aimed at deepening trade, economic cooperation and regional division of labour. In parallel with the formation of large economic and political regional associations at the macro level, globalization has accelerated the process of diversification of territorial administration functions within individual states. The redistribution of power within individual countries is seen as a parallel process of regionalization at the grassroots level. The signs of regionalism at the micro level include the increasing role of subnational territorial communities, the growth of their interest in establishing closer cooperation with the border territories of neighboring countries. In the most general sense, the author considers regionalism as a dynamic feature of international political and economic processes, indicated by the diversification of management functions at different levels of socio-political organization. The methodology of political science distinguishes the manifestations of regionalisms at the macro and micro levels. Various manifestations of regionalism are embodied in the design of large economic spaces, the redistribution of power within individual countries, increasing the level of regional self-government, development of interregional contacts and interregional integration ties between neighbouring and/or geographically close countries. The practice of interregional cooperation is most successfully applied within the framework of multilateral integration associations, primarily in the EU and in the wider European space covered by the scope of European conventions and decisions in the field of spatial cooperation of territorial communities and authorities, including local and regional self-government. Interaction between subnational regions includes the conclusion of agreements between territorial communities of neighbouring countries, the creation of interregional associations and contractual networks of interregional cooperation.

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