To build resilient food supply chains, import sources must be diversified. If country-specific standards act as trade barriers, regulatory harmonisation or equivalence can reduce these constraints and the associated loss of welfare. Harmonised standards align product characteristics across countries, thereby lowering firms’ adaptation costs, improving trade and enhancing information symmetry. This reduces sourcing risks and stabilises trade relationships. Despite harmonisation's potential to reduce non-tariff trade barriers and enhance welfare, the exact channels or mechanisms through which these effects occur remain under-explored. This project aims to structurally investigate the economic channels through which harmonised organic standards affect trade volumes and duration. Using a case study highly relevant to Switzerland, the project will generate new insights into the impact of policies at micro (i.e. firm) and macro (i.e. regional) levels. This will enable policymakers to assess the effectiveness of equivalence agreements in achieving their objectives.