“…Subjects of studies focus on theoretical and empirical issues, analysing the impact of population aging on demographic processes (e.g., Coulson, 1968;Cheal, 2000;Sanderson & Scherbov, 2007Walford & Kurek, 2008;Długosz, 2003;Długosz & Biały, 2013;Gregory & Patuelli, 2015;Horn & Schweppe, 2016). Since the 1980s, studies focused on migration of seniors have contributed considerably to the development of this academic subject (e.g., Newbold, 1996;King et al, 1998;Gaag et al, 2000;Marr & Millerd, 2004;Bahar et al, 2009) and are still being explored by academic scholars (e.g., Atkins, 2017;Pytel, 2017;Rallu, 2017;Neumann, 2018). Presently, there are more interpretations set in various contexts, including the issue of changes in spatial and functional structure of urban and rural areas due to population aging (e.g., Bloom et al, 2015;Stjernborg et al, 2015).…”