“…A mechanism of the relational spreading of psychological capital (Story et al, 2013) within the social group is through behaviours that favour in-group members to out-group members and through the recognition, acknowledgement, appreciation and support of in-group members by those in power (see similarity-attraction effect, Montoya & Horton, 2013, Hartmann, 2000. This idea is supported by the finding that people tend to trust others who are similar to them (Williams, 2001), are more likely to affiliate with them (Philipp-Muller et al, 2020), share more information with them (Harrison et al, 2002) and are more likely to mentor them (Dreher & Cox, 1996). Relationships of mutual trust and recognition offer economic benefits, for example annual compensation advantage for in-group members (Dreher & Cox, 1996), or psychological benefits, for example better organisational adjustment of newcomers (Zheng et al, 2020).…”