“…The impulse, the source of which is the exogenous sector, activates the multiplier mechanism, leading to the development of endogenous activities and thus the development of the entire city (Sokołowski, 2008). Despite some reservations about the correctness of selected assumptions and theses put in the theory about the urban economic base - Krikelas (1992) makes an exhaustive discussion in their historical perspective -and its validity in the conditions of the ongoing transformation of the world's economy towards knowledge-driven economy (Christofakis & Gkouzos, 2014;Markusen, 2007;Rutland & O'Hagan, 2007) in the literature on economic geography, one can come across the view that there are only two proven theories comprehensively explaining the regularities and dependencies of the functional development of cities -the theory of central places and the economic base theory (Walkiewicz, 2006).…”