“…Work on the fundamental theory of how best to conduct regionalization analyses, in general, is active and ongoing (Folch and Spielman, 2014;Laura et al, 2015;Kim et al, 2016;She et al, 2017). Although regions are sometimes required purely for statistical purposes (Openshaw, 1977;Spielman and Folch, 2015), regions are often used to model urban residential markets (Royuela and Duque, 2013), social communities (Hipp, 2010;Hipp et al, 2012, political communities (Morrill, 1976;Guo, 2008;Pang et al, 2010;Tam Cho and Liu, 2016;Magleby and Mosesson, 2018), disease clusters (Assuncao et al, 2006), and transit zones (Guo and Bhat, 2007;Li et al, 2014;Chen et al, 2015). 3 Depending on the social process under study and the frame of analysis, these may be larger or smaller than other common notions of how "large" a neighborhood is from the perspective of the expressive literature (Spielman and Singleton, 2015).…”