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.

Giovanni Galizzi and Luciano Venturini The food industry has been characterized by several and profound changes in its structure and competitive environment in the last decades. Although it is not a research-oriented industry, there is no arguing that technological change and particularly product innovations are crucial determinants of ftrms' performance and In recent years food manufacturers have accelerated the consumers' welfare. development of new products, by using new ingredients, processing and packaging techniques. Thus, food markets are increasingly characterized by competitive environments where relevant flows of innovative products, quality improvements and new technologies provide new consumption trends, food habits, market opportunities and ftrms' strategies. However, the issue of product innovation in the food industries has been rather neglected by economists. Few works have explicitly addressed this issue. After the pioneering book of Buzzell and Nourse (1967), one can count few contributes. Connor (1981) examined the empirical determinants of new food products introductions. Padberg and Westgren (1979) provided crucial insights about the nature of food innovation through their notions of consumer inertia, technological redundancy and incremental product innovation. Some case-studies provide useful empirical materials, but they are generally sparse.