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Yep, this is one of the many research bulletins published by GaWC and the
people around Peter Taylor. But as can be read in this particular report:

"This model can be formally represented by a matrix Vij defined by n cities
x m firms where vij is the 'service value' of city i to firm j. Service
value is the importance of a city to a firm's office network which depends
upon the size and functions of an office or offices in a city. Thus every
column denotes a firm's global strategy and every row describes each city's
mix of services. Using this matrix, elementary network analyses can be
conducted of the world city network. For instance, a city's network
connectivity can be defined as the sum of the products of its service values
with every other city's service values."

And this is indeed an artificial way of fetching structural data
(connectivity data above). One major criticism is, I think, quite
fundamental: shouln't large 'service values' in two cities imply a lower
connectivity between these two cities as they through their larger 'service
values' can offer more services to the respective city? In the specification
above (and some other bulletins from GaWC) it doesn't; on the contrary. Two
cities, one with a low service value and one with a high service value of
TNC:s, should theoretically imply that there was more connections between
these two actors/cities.

But it is still extremely interesting, I think, to mix economic geography
and (social) network analysis. In GaWC research bulletin 23, they have drawn
an interesting sociogram (last page of this RB) where each city node consist
of an internal setup of actors, i.e a subgraph interlocked in an actor. (Is
there an official SNA terminology for such graphs; dumb newbie question no
324 perhaps...)

Yours,
Carl


-----Ursprungligt meddelande-----
Fran: Social Networks Discussion Forum [mailto:[log in to unmask]]For
Valdis
Skickat: den 18 oktober 2002 02:05
Till: [log in to unmask]
Amne: city centrality


*****  To join INSNA, visit http://www.sfu.ca/~insna/  *****

Wasn't there a recent conversation on how cities are linked?

Sorry if this is a dup post, I just ran across this...

  http://www.lboro.ac.uk/gawc/rb/rb88.html


Valdis

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