Henning M., Stam E. and Wenting R. Path dependence research in regional economic development: cacophony or knowledge accumulation, <italic>Regional Studies</italic>. The concept of path dependence has gained momentum in the social sciences, particularly in economic geography. This paper explores the empirical...

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...