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Identifying regular blocks in valued networks: A heuristic applied to the St. Marks carbon flow data, and international trade in cereal products

Nordlund, Carl LU (2007) In Social Networks 29(1). p.59-69
Abstract
While the concept of regular equivalence is equally applicable to dichotomous as well as valued networks, the identification of regular blocks in regular blockmodels is somewhat problematic when dealing with valued networks. Applying the standard procedure for identifying ties in such blockmodels, a procedure perhaps most suited for dichotomous networks, does tend to generate block images and reduced graphs that differ from intuitive notions of such structures.



This paper outlines a formal heuristic procedure for identifying regular ties in valued networks where the “significance” of ties is related to each actor's role sets. Combined with measures for block criteria fulfillment, the procedure yields reduced graphs,... (More)
While the concept of regular equivalence is equally applicable to dichotomous as well as valued networks, the identification of regular blocks in regular blockmodels is somewhat problematic when dealing with valued networks. Applying the standard procedure for identifying ties in such blockmodels, a procedure perhaps most suited for dichotomous networks, does tend to generate block images and reduced graphs that differ from intuitive notions of such structures.



This paper outlines a formal heuristic procedure for identifying regular ties in valued networks where the “significance” of ties is related to each actor's role sets. Combined with measures for block criteria fulfillment, the procedure yields reduced graphs, which seem more sensitive to patterns, rather than strengths, of ties.



Two data sets are used as examples in this paper: the St. Marks carbon flow web dataset, and a new dataset containing international trade flows of cereals and cereal products based on Comtrade data. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Network analysis, Regular blockmodels, Valued networks, Regular blocks
in
Social Networks
volume
29
issue
1
pages
59 - 69
publisher
Elsevier
external identifiers
  • wos:000244397100005
  • scopus:33846305453
ISSN
0378-8733
DOI
10.1016/j.socnet.2005.12.001
language
English
LU publication?
yes
id
7529be4b-2896-436c-9309-d752d9cae9e6 (old id 157775)
date added to LUP
2007-07-26 12:55:52
date last changed
2017-01-01 07:26:48
@article{7529be4b-2896-436c-9309-d752d9cae9e6,
  abstract     = {While the concept of regular equivalence is equally applicable to dichotomous as well as valued networks, the identification of regular blocks in regular blockmodels is somewhat problematic when dealing with valued networks. Applying the standard procedure for identifying ties in such blockmodels, a procedure perhaps most suited for dichotomous networks, does tend to generate block images and reduced graphs that differ from intuitive notions of such structures.<br/><br>
<br/><br>
This paper outlines a formal heuristic procedure for identifying regular ties in valued networks where the “significance” of ties is related to each actor's role sets. Combined with measures for block criteria fulfillment, the procedure yields reduced graphs, which seem more sensitive to patterns, rather than strengths, of ties.<br/><br>
<br/><br>
Two data sets are used as examples in this paper: the St. Marks carbon flow web dataset, and a new dataset containing international trade flows of cereals and cereal products based on Comtrade data.},
  author       = {Nordlund, Carl},
  issn         = {0378-8733},
  keyword      = {Network analysis,Regular blockmodels,Valued networks,Regular blocks},
  language     = {eng},
  number       = {1},
  pages        = {59--69},
  publisher    = {Elsevier},
  series       = {Social Networks},
  title        = {Identifying regular blocks in valued networks: A heuristic applied to the St. Marks carbon flow data, and international trade in cereal products},
  url          = {http://dx.doi.org/10.1016/j.socnet.2005.12.001},
  volume       = {29},
  year         = {2007},
}