Jan is a senior scientist in the field of food supply chains and food systems, aiming at understanding relationships between supply chain configurations and effectiveness of fulfilling the market demands for food and non-food products. A holistic view on food chains and the whole food supply chain is essential to generate intended effects of any intervention. For that Jan is focussing on the connection between agricultural production and markets, in formal and informal supply systems, including ineffectiveness (like food losses) and impacts (carbon footprint of supplied food products).