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Agglomerative Forces and Cluster Shapes

William Kerr1; Scott Duke Kominers2

1 Harvard University · 2 Harvard University Press

The Review of Economics and Statistics 2015

We model spatial clusters of similar firms. Our model highlights how agglomerative forces lead to localized, individual connections among firms, while interaction costs generate a defined distance over which attraction forces operate. Overlapping firm interactions yield agglomeration clusters that are much larger than the underlying agglomerative forces themselves. Empirically, we demonstrate that our model’s assumptions are present in the structure of technology and labor flows within Silicon Valley. Our model further identifies how the lengths over which agglomerative forces operate influence the shapes and sizes of industrial clusters; we confirm these predictions using variations across patent technology clusters.

DOI
10.1162/rest_a_00471
Volume
97 (4)
Pages
877-899
Language
en
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