Neffke F., Henning M., Boschma R., Lundquist K.-J. and Olander L.-O. The dynamics of agglomeration externalities along the life cycle of industries, Regional Studies. This paper investigates the changing roles of agglomeration externalities along the industry life cycle. It is argued that...

Frenken K., Van Oort F. and Verburg T. (2007) Related variety, unrelated variety and regional economic growth, Regional Studies 41, 685-697. In economic theory, one can distinguish between variety as a source of regional knowledge spillovers, called Jacobs externalities, and variety as a...