Large cities have some inherent urban and architectural attributes that make them attractive to the concentration of people and various economic activities, especially by the so-called knowledge economy sectors. They involve the transformation
of talent and skills of workers, which require a constant spatial interaction. This means frequent face-to-face contacts.
Agglomeration economies found in large cities are the determining factors behind knowledge economy growth, which in
turn promotes the employment and residential density growth, as a whole. Hence, geographical proximity to the main
urban centers of the metropolitan urban hierarchy becomes a causal factor for the growth and concentration of employment
in these economy sectors. The aim of the research is to understand and model how knowledge economy externalities affect
metropolitan employment density growth, and how the inter-municipal distances to the metropolitan core and the other
largest metropolitan cities encourage that process. This phenomenology is studied in the metropolitan regions of Barcelona
and Helsinki as follows: in Barcelona by modeling the density growth with employment data, inter-municipal distances
and economic inter-linkages for the period 1991-2001; and in Helsinki by analyzing of employment pattern distributions
with employment data for the period 2007-2010. Results suggest that the cities, especially the larger ones and their
surrounding areas of both metropolitan regions, have a high value of knowledge economy activity concentrations due
to the agglomeration economies found in them. Hence, the proximity to these large cities becomes the main factor that
explains employment density growth and agglomeration patterns of the KIS employment.
