| Spillovers | The term could be use broadly like “ tehcnological spillovers, gains from sharing labor markets, gains from interfirm trade, the effect of local knowledge on the location of the spin-off firms, and many other forces that might provide increased profits to firms locating near other firms in the same industry” Ellison, G. and E. L. Glaeser (1997). "Geographic Concentration in U.S. Manufacturing Industries: A Dartboard Approach." Journal of Political Economy Vol. 105(No. 5): p.894 |