The article examines how the port of Antwerp impacts the economy in detail, beyond just general indicators like value added and employment. By analyzing the relationships between different players in the port and other industries, the study shows how changes in port activity affect the national economy. Using a bottom-up approach with microeconomic data, the researchers identify key customers and suppliers of the port. They also find that freight forwarders and agents play a crucial role in the port's operations. The study suggests that the port of Antwerp has significant economic effects both functionally and geographically, with major agglomerating effects in and around the port.