“…Omitting spatial interdependencies between regions may distort the estimation results of the regional growth equation. Many previous studies have also emphasized the presence of spatial effects in the Russian case (e.g., Demidova and Ivanov, 2016;Kholodilin, Oshchepkov and Siliverstovs, 2012;World Bank, 2017 , where d is geographical (arc)distance between regions i and j. Following the literature, we expect that the estimate of 5 will be significant and positive, i.e., that growing regions tend to be located closer to other growing regions, either due to growth spill-overs, or because growing regions have similar economic structures pre-determined by similar geo-climatic conditions.…”