CONCEPT
Clusters (Economic Geography)
Porter's theory of why innovation concentrates geographically — proximity enabling knowledge spillovers, specialized resources, and intense rivalry that dispersed arrangements cannot replicate.
Clusters are geographic concentrations of interconnected companies, specialized suppliers, service providers, and associated institutions in a particular field. Porter's research demonstrated that clusters are not accidents of history but structural consequences of competitive dynamics: knowledge spills over between neighboring firms through informal conversation and employee mobility; local rivalry drives innovation more powerfully than distant competition; specialized suppliers and institutions emerge to serve cluster needs, creating ecosystems whose combined capability exceeds what any individual firm could build. Silicon Valley is the paradigm: the density of technology firms, venture capital, universities, and cultural norms produced a competitive advantage no other region matched for fifty years. The cluster advantage was not in any firm but in the network.
In The You On AI Field Guide
AI poses a direct challenge to cluster theory. If execution can be performed anywhere through AI assistance, does geographic proximity still matter? The developer in Nairobi using Claude Code produces software of comparable quality to the developer in San Francisco. The designer in Bucharest generates visuals indistinguishable from those