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

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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, 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.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Social and Economic Geography

Keywords

  • Network analysis, Regular blockmodels, Valued networks, Regular blocks
Original languageEnglish
Pages (from-to)59-69
JournalSocial Networks
Volume29
Issue number1
Publication statusPublished - 2007
Publication categoryResearch
Peer-reviewedYes

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