P<sc>otter</sc> A. and W<sc>atts</sc> H. D. Revisiting Marshall's agglomeration economies: technological relatedness and the evolution of the Sheffield metals cluster, <italic>Regional Studies</italic>. According to Alfred Marshall, firms receive increasing returns from a trinity of agglomeration economies: a local pool of...

Clusters now form a central element in many regional economic development policies. Location within a cluster of related industries is thought to increase a firm's competitive advantage resulting in higher output and productivity growth rates than in similar firms located beyond the cluster....