Unravelling influence through social network analysis in different dairy systems in the Canton of Zurich

While being the economically most important agricultural sector in Switzerland, the milk value chain is faced with structural changes as well as economic, social and environmental challenges. To achieve the Sustainable Development Goals, food systems such as the milk value chain must be transformed so that they provide nutritious, affordable food while ensuring fair working conditions and minimizing environmental impacts. Engaging in participative processes and considering regional contexts are crucial for successful transformations. Using Social Network Analysis (SNA) and stakeholder analysis in two districts in the canton of Zurich (Hinwil and Horgen), this study aims at providing an understanding of the interrelations in milk value chains and the key actors within. After comprehensive actor identification through secondary research, an online survey, validated by pre-test interviews with experts along the milk value chain, collected data about the trade, information, and collaboration networks. Hinwil demonstrates a rather vivid milk value chain with local processors collaborating under the natürli label, whereas Horgen relies more on non-local processors. Both value chains show distinct funnel structures with processors and distributors in bottleneck positions. The study identifies key actors who hold central network positions, have high interest in and self-assessed influence on the regional milk value chain, or are perceived as influential. Overall, this study outlines a systematic approach to gain a better understanding of regional food value chains and the key actors within, laying the foundation for the participatory development of sustainable food value chains.