“…A smaller department size was associated with shorter times-to-degree for doctoral students (Stricker, 1994), and likewise student–faculty ratios and percentage of full-time faculty were significant factors in explaining graduation rates (Goenner & Snaith, 2004). Faculty advisers were indeed influential to doctoral student experience (Zhao, Golde, & McCormick, 2007), in particular in the STEM fields (Joy, Liang, Bilimoria, & Perry, 2015). Doctoral experience and attrition (Gardner, 2009, 2010) as well as time-to-degree (Gillingham et al., 1991; Seagram et al., 1998) also differ by fields of study.…”