Tacit knowledge and the formation of cities

According to the theory of agglomeration, cities arose to allow the exchange of goods and services, and the reduction of costs and production times. However, there appears to be a higher force that determines the formation and existence of agglomerations. This is tacit knowledge, a kind of knowledge not easily quantified and which requires face to face contact to be transmitted. This article introduces the reader to the thesis of tacit knowledge as the main reason for the formation and continuity of cities which then become centers of production and the communication of ideas.