“…Consequently, many researchers have shown that a relational and cooperative orientation is key, in customer-seller relationships, to improving value creation and the customer's competitive advantage (Anderson & Narus, 1991;Cardozo, Shipp, & Roering, 1992;Day, 2000;Dunn & Thomas, 1994;Dyer & Singh, 1998;Ford, 2001;Grönroos, 1997;Jap, 1999;Morgan & Hunt, 1994) and is increasingly the norm in buyer-seller relationships (Walter, Müller, Helfert, & Ritter, 2003). For these academics, value creation is optimised via cooperative relationships (Ulaga & Eggert, 2006), even if they recognise that "customer firms perceive value creation as positive only if they appropriate a larger slice of the bigger value pie" (Wagner, Eggert, & Lindemann, 2010:1).…”