“…One of the first studies into personal network dynamics was conducted in Toronto during several decades, first by Leighton and Wellman (in 1968) and later (1978 and 2004/'05) by Wellman and his collaborators (see Wellman, Carrington & Hall, 1988;Wellman, Wong, Tindall, & Nazer, 1997;Wellman et al, 2005). These so-called East York studies have shown how personal networks change over time and have estimated, among others, the influence of distance and communication on this evolution (Mok & Wellman, 2007;Mok, Wellman, & Carrasco, 2008).…”