The latest GWS Briefing 2026/7 documents the update to the LÄNDER model. Previous distance-based estimation methods used to map interregional supply chain linkages between the 16 federal states have been replaced by empirical transport data. By integrating the BMDV’s 2040 transport forecast, the model utilises real-world information on transport routes, modes, volumes and values between all German districts for the first time. The data reveal more concentrated supply chains than previously assumed. Metal deliveries to Bavaria originate predominantly from Baden-Württemberg and within the state itself, whilst machinery manufacturers in Saxony supply almost entirely from within their own region. The patterns of interdependence vary significantly depending on the goods group and destination region. The empirically sound data basis of the 2040 transport forecast enables more precise analyses of the regional impacts of infrastructure, energy and industrial policy. The updated model thus provides a more solid foundation for regional economic analyses.
 

Ulrich, P. & Hembach-Stunden, K. (2026): Neue Datengrundlage für regionale Analysen. Verkehrsprognose 2040 verbessert die Abbildung interregionaler Lieferverflechtungen im Modell. GWS-Kurzmitteilung 7/2026, Osnabrück.