5. Conclusions
In controlled and regulated fields, such as the public sector, a high degree of isomorphism between regional organisations should be expected (DiMaggio and Powell, 1983; D’Aunno et al., 1991; Dacin, 1997; Frumkin and Galaskiewicz, 2004). Our results help our understanding of the problems of developing and implementing collaborative procurement strategies through exposing how stakeholders resist external forces to collaborate. The data suggests that the barriers to collaborative procurement are many, complex and deeply engrained. This study contributes to public procurement research by exploring where, and why, tensions and conflicts occur in collaborative public procurement strategies, both within internal supply chains, and between organisations.