“…On one hand, due to strict screening of physical conditions before joining the army, veterans may be healthier than civilians, which is called the “healthy soldier effect” (McLaughlin et al, 2008). On the other hand, the advantages of veterans are also reflected in enjoying better social welfare and medical resources (Angrist, 1998; Davies et al, 2015; Oh & Berry, 2021; Waller & McGuire, 2011), having more competitive military skills (Johansen et al, 2014; Lindqvist & Vestman, 2011; MacLean, 2017), improving personal qualities and abilities (Angrist & Chen, 2011; Brown & Routon, 2016; Eynde, 2015; L. Wang et al, 2012), obtaining higher socioeconomic status (e.g., Angrist & Krueger, 1994; Bachman et al, 2000; Brown & Routon, 2016; MacLean & Kleykamp, 2021; Sheehan & Hayward, 2019; Smith et al, 2012), and accumulating political resources (Diamant, 2008; Hou et al, 2020; Wakenhut, 1979; Wu & Treiman, 2004).…”