New analysis and empirical evidence on several topics such as the determinants of shape and nature of the vertical relationships in the food system, the determinants of vertical co-ordination and competition, types and mechanisms of co-ordination as well as the consequences for competitiveness, consumer welfare and policy implications are provided. The focus is on vertical issues at different stages of the food chain with a particular emphasis on the increasing role played by retailers in shaping the vertical relationships in the food system through the development of food supply-chain management.