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The strategic goals of spatial development of the Russian Federation are focused on finding promising specializations and simulating the differentiated development of regions. One of the mechanisms for the formation of regional uniqueness and transformation of the structure of the economy in multidisciplinary regions is the mechanism of agglomeration as a simultaneous pro-cess of intra-industry diversification and industrial concentration of the economic activity of a single industry (MAR effects) and the process of territorial concentration of resources, industries, competencies, dynamizing intersectoral diversification of economic activity (Jacobs effects). The ratio in intensity and strength of MAR and Jacobs effects determines promising centers of growth and specialization of regions. The article is aimed at assessing the uniqueness and substantiating the differentiated development of single-industry regions from the standpoint of identifying MAR and Jacobs effects using the example of official statistics for four regions of the metallurgical profile: Lipetsk, Vologda, Chelyabinsk regions, and Krasnoyarsk Territory. The assessment of in-tegral indices, as characterizing the results of changes in the structure of the economy using the example of these effects, has made it possible to substantiate the spectrum of unique trajectories of sectoral development, which varies from a symmetric polycentric sectoral structure in the Li-petsk Region to the preservation of monocentricity in the Chelyabinsk Region. The developed methodology for assessing regional uniqueness and identifying areas of differentiated develop-ment can become the basis for the formation of a complex of differentiated measures of public administration and support.
Pravdina et al. (Fri,) studied this question.