PART 1: Agri-food Chain Relationships - Context and Theoretical Foundations; 1. Building Sustainable Relationships in Agri-food Chains: Challenges from Farm to Retail; 2. Collaborative Advantage, Relational Risks, Contracts and Relationship Sustainability: a Literature Review; 3. Inter-organisational Relationships in Agri-food Systems: an Integrated Transaction Cost-Network Analysis Framework; 4. Behavioural Economics and the Theory of Social Structure: Relevance for Understanding Relationship Sustainability; PART 2: Empirical Evidence on Relationship Types, Relationship Sustainability, Trust and Use of Contracts; 1. Trust and Relationship Types in Agri-food Chain Relationships in Selected European countries; 2. The Determinants of Relationship Type Choice and Relationship Sustainability: a European Cross-country Analysis; 3. Enhancing the Integration of Agri-food Supply Chains: Challenges in the UK Malting Barley Supply Chain; 4. From Transactions to Relationships: the Case of the Irish Beef and Pigmeat Supply Chains; 5. Inter-enterprise Relationships as Determinants for Competitiveness in the Agri-food Sector: the Spanish Wheat-to-Bread Chain; 6. Reviewing Relationship Sustainability in the Case of the German Wheat-to-Bread Chain; 7. Vertical Relationships in the US Agri-food System: the Role of Agricultural Cooperatives; 8. Guanxi and Contracts in Chinese Vegetable Supply Chains: an Empirical Investigation; 9. A Review of the Trust Situation in Agribusiness Chain Relationships in the Asia-Pacific with focus on the Philippines and Australia; 10. How Buyer-Supplier Relationships Can Create Value - the Case of the Australian Wine Industry; PART 3: Implications and Recommendations; 11. Best Practice in Relationship Management: Recommendations for Farmers, Processors and Retailers; 12. Improving Agri-food Chain Relationships: the Role of Government; 13. Lessons Learned: Recommendations for Future Research on Agri-food Chain Relationships.