“…Previous studies on supplier involvement have focused on integration (Petersen et al 2005), coordination , joint location , technology roadmaps (Petrick and Echols, 2004), technological uncertainties (Melander and Tell, 2014), knowledge sharing (Tell, 2011), trust (Das and Teng, 1998), and a number of other related issues concerning supplier involvement in NPD projects. However, there is still much to be explored, particularly in collaboration between equally powerful firms taking both firms" perspectives (Johnsen, 2009).…”