“…We have repeatedly suggested that in order to achieve sustainable development, it is necessary to significantly increase investment in science and education (i.e. knowledge in general) (Tarabasz et al, 2018;Dzimińska et al, 2020;Sułkowski et al, 2019). Many other authors have insisted on this (Sedziuviene & Vveinhardt, 2018, p. 226;Mikalauskiene & Atkociuniene, 2019;Tamasevicius et al, 2020;Tóth et al, 2020), particularly, investigating effects of intellectual capital restoring considering the impact of external migration (Bilan et al, 2019;Mishchuk et al, 2019;).…”