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Geographers (and George Barnett) have been doing this sort of stuff for
years. Jim Simmons, now retired from Toronto Geography, did intercity
phone calls 25 years ago; Johan Galtung (ok, not a geog) did intercity
airline flights also a while back; George has been playing with a lot of
There's also a huge city centrality lit.
I haven't tracked the lit, so don't ask me, but I am sure that it exists
and should be checked before people charge off to do new stuff.
And I would be interested in the question of does distance matter in
Internet contact? As compared to Phone and F2F?
My highly scientific (;-)) study of 12 Berkely grad students in 24 hours
use of the net showed that 57% of their emails were within Berkeley. Many
of the rest were from their hometowns (carrying the neighborhood with
Barry Wellman Professor of Sociology NetLab Director
[log in to unmask] http://www.chass.utoronto.ca/~wellman
Centre for Urban & Community Studies University of Toronto
455 Spadina Avenue Toronto Canada M5S 2G8 fax:+1-416-978-7162
On Thu, 17 Oct 2002, Valdis wrote:
> Date: Thu, 17 Oct 2002 20:35:19 -0400
> From: Valdis <[log in to unmask]>
> To: [log in to unmask]
> Subject: Re: SV: city centrality
> ***** To join INSNA, visit http://www.sfu.ca/~insna/ *****
> How about travel volume between cities [adjusted for city size?] as a tie indicator?
> Even if you limited it to just airline traffic...
> Or phone traffic... area code to area code?
> Carl Nordlund wrote:
> > 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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