“…Depending on their approach to connectivity, scholars may choose different ways to evaluate it. Studies of territorial connectivity may focus on transport networks (Adzhikova, Shkolnikova, 2016); the volume, structure and effectiveness of resource exchange (goods, labour, etc) (Polozhentseva, 2018; Morgoev, 2006;Kirillova, Kantor, 2010;Tian, Zhang, 2019;Fan, Liu, 2020); the correlation 2 and regression relationships between GRP and factors of its development (Polyakova, Simarova, 2014b); and agglomeration processes -through expert evaluation of the interactions (Volchkova et al, 2016). Some studies measure the extent of the deformation at the intersection of production, distribution and consumption of gross product by concentrating on the deviations in the region's indicator value from the national average and on the 'differences between the minimal and maximal values of the indicators across the country' (Panina, 2007).…”