How market size drove the localisation of knowledge hubs in the US

Knowledge hubs are generally located in large and dynamic population clusters, but there is little empirical evidence on what has driven the location of services in the economy, particularly the knowledge-intensive ones that form these hubs. This column describes how the geography of services across the US has been influenced by the interaction between county and industry characteristics. The presence of large markets enhanced the agglomeration of services mainly through linkages with other services and manufacturing firms.