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...

Measures of entrepreneurship, such as average establishment size and the prevalence of start-ups, correlate strongly with employment growth across and within metropolitan areas, but the endogeneity of these measures bedevils interpretation. Chinitz (1961) hypothesized that coal mines near...

Policy makers in both developed and developing countries want to accelerate spatial development, make cities more competitive, attract new entrepreneurs, boost economic growth, and promote job creation. These are commendable goals given that city populations in developing countries are expected...

This Economic Premise examines the link between highways and spatial development. The Golden Quadrilateral (GQ) highway project in India—5,846 km of highways linking four major urban hubs—improved the connectivity and market accessibility of districts close to the highway compared to those...