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***** 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? Valdis 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 > > _____________________________________________________________________ > SOCNET is a service of INSNA, the professional association for social > network researchers (http://www.sfu.ca/~insna/). To unsubscribe, send > an email message to [log in to unmask] containing the line > UNSUBSCRIBE SOCNET in the body of the message. _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.sfu.ca/~insna/). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.