“…A further prominent aspect of SDP research are relational variables. Mirroring other bodies of literature such as relationship marketing (Morgan & Hunt, 1994), variables such as commitment/trust (Ghijsen, Semeijn, & Ernstson, 2010;Govindan, Kannan, & Haq, 2010;Krause, Handfield, & Tyler, 2007;Li et al, 2007;Nagati & Rebolledo, 2013;Prahinski & Benton, 2004), programme specific investments (Ghijsen, Semeijn, & Ernstson, 2010;Govindan, Kannan, & Haq, 2010;Li et al, 2007;Mahapatra, Das, & Narasimhan, 2012;Wagner, 2006), dependence (Carr et al, 2008;Ghijsen, Semeijn, & Ernstson, 2010), relationship orientation (Arroyo-Lopez, Holmen, & Boer, 2012;Mahapatra, Das, & Narasimhan, 2012) and fair distribution of costs and benefits (Praxmarer-Carus, Sucky, & Durst, 2013) have been used to examine SDPs relative to certain performance outcomes. Further variables not commonly associated with relationship marketing have also been used such as relational capital (Krause, Handfield, & Tyler, 2007) and value co-production (Lakshman & Parente, 2008) which may encompass buyer-supplier involvement and supplier training initiated by buyers (Carr et al, 2008) and staff transfers (Wagner, 2006;Wagner & Krause, 2009).…”