Blockmodeling

<h2 id="definition">Definition</h2>

A network as a system is composed of (or defined by) two different sets: one set of units (nodes, vertices, actors) and one set of links between the units. Using both sets, it is possible to create a <a href="/facts/Graph_(discrete_mathematics)/kw3eIBUe">graph</a>, describing the structure of the network.<a class="footnote-ref" id="fnref:9" href="#fn:9">9</a>
During blockmodeling, the researcher is faced with two problems: how to partition the units (e.g., how to determine the <a href="/facts/Cluster_analysis/HUeDnWPt">clusters</a> (or classes), that then form vertices in a blockmodel) and then how to determine the links in the blockmodel (and at the same time the values of these links).<a class="footnote-ref" id="fnref:10" href="#fn:10">10</a>
In the <a href="/facts/Social_sciences/hAbm1xtD">social sciences</a>, the networks are usually <a href="/facts/Social_network/kQg6aEVf">social networks</a>, composed of several individuals (units) and selected <a href="/facts/Social_relationship/DU3HW2Ah">social relationships</a> among them (links). Real-world networks can be large and complex; blockmodeling is used to simplify them into smaller structures that can be easier to interpret. Specifically, blockmodeling partitions the units into clusters and then determines the ties among the clusters. At the same time, blockmodeling can be used to explain the <a href="/facts/Social_role/LDthMhoD">social roles</a> existing in the network, as it is assumed that the created cluster of units mimics (or is closely associated with) the units' social roles.<a class="footnote-ref" id="fnref:11" href="#fn:11">11</a>

Blockmodeling can thus be defined as a set of approaches for partitioning units into clusters (also known as positions) and links into blocks, which are further defined by the newly obtained clusters. A block (also blockmodel) is defined as a submatrix, that shows interconnectivity (links) between nodes, present in the same or different clusters.<a class="footnote-ref" id="fnref:12" href="#fn:12">12</a> Each of these positions in the cluster is defined by a set of (in)direct ties to and from other social positions.<a class="footnote-ref" id="fnref:13" href="#fn:13">13</a> These links (connections) can be directed or undirected; there can be multiple links between the same pair of objects or they can have weights on them. If there are not any multiple links in a network, it is called a simple network.<a class="footnote-ref" id="fnref:14" href="#fn:14">14</a>: 8 
A <a href="/facts/Matrix_(mathematics)/qa8FI4ko">matrix</a> representation of a graph is composed of ordered units, in rows and columns, based on their names. The ordered units with similar patterns of links are partitioned together in the same clusters. Clusters are then arranged together so that units from the same clusters are placed next to each other, thus preserving interconnectivity. In the next step, the units (from the same clusters) are transformed into a blockmodel. With this, several blockmodels are usually formed, one being core cluster and others being cohesive; a core cluster is always connected to cohesive ones, while cohesive ones cannot be linked together. Clustering of nodes is based on the <a href="/facts/Equivalence_relation/1MQ5rtkW">equivalence</a>, such as structural and regular.<a class="footnote-ref" id="fnref:15" href="#fn:15">15</a> The primary objective of the matrix form is to visually present relations between the persons included in the cluster. These ties are coded dichotomously (as present or absent), and the rows in the matrix form indicate the source of the ties, while the columns represent the destination of the ties.<a class="footnote-ref" id="fnref:16" href="#fn:16">16</a>
Equivalence can have two basic approaches: the equivalent units have the same connection pattern to the same neighbors or these units have same or similar connection pattern to different neighbors. If the units are connected to the rest of network in identical ways, then they are structurally equivalent.<a class="footnote-ref" id="fnref:17" href="#fn:17">17</a> Units can also be regularly equivalent, when they are equivalently connected to equivalent others.<a class="footnote-ref" id="fnref:18" href="#fn:18">18</a>
With blockmodeling, it is necessary to consider the issue of results being affected by measurement errors in the initial stage of acquiring the data.<a class="footnote-ref" id="fnref:19" href="#fn:19">19</a>

<h2 id="different-approaches">Different approaches</h2>
Regarding what kind of network is undergoing blockmodeling, a different approach is necessary. Networks can be one–mode or two–mode. In the former all units can be connected to any other unit and where units are of the same type, while in the latter the units are connected only to the unit(s) of a different type.<a class="footnote-ref" id="fnref:20" href="#fn:20">20</a>: 6–10  Regarding relationships between units, they can be single–relational or multi–relational networks. Further more, the networks can be temporal or multilevel and also binary (only 0 and 1) or signed (allowing negative ties)/values (other values are possible) networks.
Different approaches to blockmodeling can be grouped into two main classes: <a href="/facts/Deterministic_blockmodeling/H9owl4H2">deterministic blockmodeling</a> and <a href="/facts/Stochastic_blockmodeling/9Y2SXDrM">stochastic blockmodeling</a> approaches. Deterministic blockmodeling is then further divided into direct and indirect blockmodeling approaches.<a class="footnote-ref" id="fnref:21" href="#fn:21">21</a>

Among direct blockmodeling approaches are: <a href="/facts/Structural_equivalence/TdCJbRfX">structural equivalence</a> and <a href="/facts/Regular_equivalence/TdCJbRfX">regular equivalence</a>.<a class="footnote-ref" id="fnref:22" href="#fn:22">22</a> Structural equivalence is a state, when units are connected to the rest of the network in an identical way(s), while regular equivalence occurs when units are equally related to equivalent others (units are not necessarily sharing neighbors, but have neighbour that are themselves similar).<a class="footnote-ref" id="fnref:23" href="#fn:23">23</a><a class="footnote-ref" id="fnref:24" href="#fn:24">24</a>: 24

Indirect blockmodeling approaches, where partitioning is dealt with as a traditional cluster analysis problem (measuring (dis)<a href="/facts/Similarity_(network_science)/TdCJbRfX">similarity</a> results in a (dis)similarity matrix), are:<a class="footnote-ref" id="fnref:25" href="#fn:25">25</a><a class="footnote-ref" id="fnref:26" href="#fn:26">26</a> 

<ul><li>conventional blockmodeling,</li>
<li><a href="/facts/Generalized_blockmodeling/7BokA3y6">generalized blockmodeling</a>:
<ul><li><a href="/facts/Generalized_blockmodeling_of_binary_networks/54kfAExM">generalized blockmodeling of binary networks</a>,</li>
<li><a href="/facts/Generalized_blockmodeling_of_valued_networks/adChXKzN">generalized blockmodeling of valued networks</a> and</li>
<li><a href="/facts/Generalized_homogeneity_blockmodeling/qhnHzafV">generalized homogeneity blockmodeling</a>,<a class="footnote-ref" id="fnref:27" href="#fn:27">27</a></li></ul></li>
<li>prespecified blockmodeling.</li></ul>
According to Brusco and Steinley (2011),<a class="footnote-ref" id="fnref:28" href="#fn:28">28</a> the blockmodeling can be categorized (using a number of dimensions):<a class="footnote-ref" id="fnref:29" href="#fn:29">29</a>

<ul><li><a href="/facts/Deterministic_blockmodeling/H9owl4H2">deterministic</a> or <a href="/facts/Stochastic_blockmodeling/9Y2SXDrM">stochastic blockmodeling</a>,</li>
<li>one–mode or two–mode networks,</li>
<li><a href="/facts/Signed_network/HWjPqG6b">signed</a> or unsigned networks,</li>
<li><a href="/facts/Exploratory_blockmodeling/E9xkHXPN">exploratory</a> or <a href="/facts/Confirmatory_blockmodeling/PXShEPCx">confirmatory blockmodeling</a>.</li></ul>
<h2 id="blockmodels">Blockmodels</h2>
Blockmodels (sometimes also block models) are structures in which:

<ul><li>vertices (e.g., units, <a href="/facts/Node_(computer_network)/eYlvVE0z">nodes</a>) are assembled within a <a href="/facts/Cluster_analysis/HUeDnWPt">cluster</a>, with each cluster identified as a <a href="/facts/Vertex_(graph_theory)/WhlWmL3o">vertex</a>; from such vertices a <a href="/facts/Graph_(discrete_mathematics)/kw3eIBUe">graph</a> can be constructed;</li>
<li>combinations of all the links (ties), represented in a block as a single link between positions, while at the same time constructing one tie for each block. In a case, when there are no ties in a block, there will be no ties between the two positions that define the block.<a class="footnote-ref" id="fnref:30" href="#fn:30">30</a></li></ul>
Computer programs can partition the social network according to pre-set conditions.<a class="footnote-ref" id="fnref:31" href="#fn:31">31</a>: 333  When empirical blocks can be reasonably approximated in terms of ideal blocks, such blockmodels can be reduced to a blockimage, which is a representation of the original network, capturing its underlying 'functional anatomy'.<a class="footnote-ref" id="fnref:32" href="#fn:32">32</a> Thus, blockmodels can "permit the data to characterize their own structure", and at the same time not seek to manifest a preconceived structure imposed by the researcher.<a class="footnote-ref" id="fnref:33" href="#fn:33">33</a>
Blockmodels can be created indirectly or directly, based on the construction of the <a href="/facts/Criterion_function/xv5ozuhl">criterion function</a>. Indirect construction refers to a function, based on "compatible (dis)similarity measure between paris of units", while the direct construction is "a function measuring the fit of real blocks induced by a given <a href="/facts/Cluster_analysis/HUeDnWPt">clustering</a> to the corresponding ideal blocks with perfect relations within each cluster and between clusters according to the considered types of connections (<a href="/facts/Equivalence_relation/1MQ5rtkW">equivalence</a>)".<a class="footnote-ref" id="fnref:34" href="#fn:34">34</a>

<h3>Types</h3>
Blockmodels can be specified regarding the <a href="/facts/Intuition/Mshu0Vxb">intuition</a>, substance or the insight into the nature of the studied network; this can result in such models as follows:<a class="footnote-ref" id="fnref:35" href="#fn:35">35</a>: 16–24 

<ul><li>parent-child role systems,</li>
<li><a href="/facts/Organizational_hierarchy/Edj1h0RE">organizational hierarchies</a>,</li>
<li>systems of ranked clusters,...</li></ul>
<h2 id="specialized-programs">Specialized programs</h2>
Blockmodeling is done with specialized <a href="/facts/Computer_program/e38jH9N9">computer programs</a>, dedicated to the analysis of networks or blockmodeling in particular, as:

<ul><li>BLOCKS (<a href="/facts/Tom_Snijders/TNkllxlu">Tom Snijders</a>),<a class="footnote-ref" id="fnref:36" href="#fn:36">36</a></li>
<li>CONCOR,<a class="footnote-ref" id="fnref:37" href="#fn:37">37</a></li>
<li>Model (<a href="/facts/Vladimir_Batagelj/2zVJCp3b">Vladimir Batagelj</a>),<a class="footnote-ref" id="fnref:38" href="#fn:38">38</a></li>
<li>Model2 (Vladimir Batagelj),<a class="footnote-ref" id="fnref:39" href="#fn:39">39</a></li>
<li><a href="/facts/Pajek/2zVJCp3b">Pajek</a> (Vladimir Batagelj and <a href="/facts/Andrej_Mrvar/h8SBadP9">Andrej Mrvar</a>),<a class="footnote-ref" id="fnref:40" href="#fn:40">40</a></li>
<li><a href="/facts/R_(programming_language)/LSrkr8K8">R</a>–package Blockmodeling (<a href="/facts/Ale%25C5%25A1_%25C5%25BDiberna/8zj7mafI">Aleš Žiberna</a>),<a class="footnote-ref" id="fnref:41" href="#fn:41">41</a><a class="footnote-ref" id="fnref:42" href="#fn:42">42</a><a class="footnote-ref" id="fnref:43" href="#fn:43">43</a></li>
<li>StOCNET (Tom Snijders),...<a class="footnote-ref" id="fnref:44" href="#fn:44">44</a></li></ul>
<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Stochastic_block_model/9Y2SXDrM">Stochastic block model</a></li>
<li><a href="/facts/Mathematical_sociology/bxIJMlDp">Mathematical sociology</a></li>
<li>Role assignment</li>
<li>Multiobjective blockmodeling</li>
<li><a href="/facts/Blockmodeling_linked_networks/HQtQSyzL">Blockmodeling linked networks</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1">Patrick Doreian, Positional Analysis and Blockmodeling. Encyclopedia of Complexity and Systems Science. DOI: https://doi.org/10.1007/978-0-387-30440-3_412 Archived 2023-02-04 at the Wayback Machine. <a href="/wiki/Patrick_Doreian" target="_blank">/wiki/Patrick_Doreian</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></li>
<li id="fn:2">Patrick Doreian, An Intuitive Introduction to Blockmodeling with Examples, BMS: Bulletin of Sociological Methodology / Bulletin de Méthodologie Sociologique, January, 1999, No. 61 (January, 1999), pp. 5–34. <a href="/wiki/Patrick_Doreian" target="_blank">/wiki/Patrick_Doreian</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></li>
<li id="fn:3">Anuška Ferligoj: Blockmodeling, http://mrvar.fdv.uni-lj.si/sola/info4/nusa/doc/blockmodeling-2.pdf Archived 2021-08-12 at the Wayback Machine <a href="/wiki/Anu%C5%A1ka_Ferligoj" target="_blank">/wiki/Anu%C5%A1ka_Ferligoj</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></li>
<li id="fn:4">Bonacich, Phillip; McConaghy, Maureen J. (1980). "The Algebra of Blockmodeling". Sociological Methodology. 11: 489–532. doi:10.2307/270873. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></li>
<li id="fn:5">Patrick Doreian, An Intuitive Introduction to Blockmodeling with Examples, BMS: Bulletin of Sociological Methodology / Bulletin de Méthodologie Sociologique, January, 1999, No. 61 (January, 1999), pp. 5–34. <a href="/wiki/Patrick_Doreian" target="_blank">/wiki/Patrick_Doreian</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></li>
<li id="fn:6">Doreian, Patrick; Batagelj, Vladimir; Ferligoj, Anuška (2005). Generalized Blockmodeling. Cambridge University Press. ISBN 0-521-84085-6. <a href="0-521-84085-6" target="_blank">0-521-84085-6</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></li>
<li id="fn:7">Batagelj, Vladimir (1999). "Generalized Blockmodeling". Informatica. 23: 501–506. <a href="#fnref:7" class="footnote-back-ref">↩</a></li>
<li id="fn:8">"WEBER, M. (2007), "Introducing blockmodeling to input-output analysis". 16th International I-Ot Conf, Istanbul, Turkey". Archived from the original on 2021-08-23. Retrieved 2021-08-23. <a href="https://www.iioa.org/conferences/16th/files/Papers/Weber%20Introducing%20blockmodeling%20to%20input-output%20analysis.doc" target="_blank">https://www.iioa.org/conferences/16th/files/Papers/Weber%20Introducing%20blockmodeling%20to%20input-output%20analysis.doc</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></li>
<li id="fn:9">Miha Matjašič, Marjan Cugmas and Aleš Žiberna, blockmodeling: An R package for generalized blockmodeling, Metodološki zvezki, 17(2), 2020, 49–66. <a href="/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1" target="_blank">/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></li>
<li id="fn:10">Batagelj, Vladimir (1997). "Notes on blockmodeling". Social Networks. 19: 143–155. <a href="#fnref:10" class="footnote-back-ref">↩</a></li>
<li id="fn:11">Miha Matjašič, Marjan Cugmas and Aleš Žiberna, blockmodeling: An R package for generalized blockmodeling, Metodološki zvezki, 17(2), 2020, 49–66. <a href="/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1" target="_blank">/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></li>
<li id="fn:12">Miha Matjašič, Marjan Cugmas and Aleš Žiberna, blockmodeling: An R package for generalized blockmodeling, Metodološki zvezki, 17(2), 2020, 49–66. <a href="/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1" target="_blank">/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></li>
<li id="fn:13">Bonacich, Phillip; McConaghy, Maureen J. (1980). "The Algebra of Blockmodeling". Sociological Methodology. 11: 489–532. doi:10.2307/270873. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></li>
<li id="fn:14">Brian Joseph Ball, Blockmodeling techniques for complex networks: doctoral dissertation. University of Michigan, 2014. <a href="#fnref:14" class="footnote-back-ref">↩</a></li>
<li id="fn:15">Miha Matjašič, Marjan Cugmas and Aleš Žiberna, blockmodeling: An R package for generalized blockmodeling, Metodološki zvezki, 17(2), 2020, 49–66. <a href="/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1" target="_blank">/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></li>
<li id="fn:16">Bonacich, Phillip; McConaghy, Maureen J. (1980). "The Algebra of Blockmodeling". Sociological Methodology. 11: 489–532. doi:10.2307/270873. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></li>
<li id="fn:17">Anuška Ferligoj: Blockmodeling, http://mrvar.fdv.uni-lj.si/sola/info4/nusa/doc/blockmodeling-2.pdf Archived 2021-08-12 at the Wayback Machine <a href="/wiki/Anu%C5%A1ka_Ferligoj" target="_blank">/wiki/Anu%C5%A1ka_Ferligoj</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></li>
<li id="fn:18">Patrick Doreian, An Intuitive Introduction to Blockmodeling with Examples, BMS: Bulletin of Sociological Methodology / Bulletin de Méthodologie Sociologique, January, 1999, No. 61 (January, 1999), pp. 5–34. <a href="/wiki/Patrick_Doreian" target="_blank">/wiki/Patrick_Doreian</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></li>
<li id="fn:19">Žnidaršič, Anja; Doreian, Patrick; Ferligoj, Anuška (2012). "Absent Ties in Social Networks, their Treatments, and Blockmodeling Outcomes". Metodološki zvezki. 9 (2): 119–138. <a href="#fnref:19" class="footnote-back-ref">↩</a></li>
<li id="fn:20">Doreian, Patrick; Batagelj, Vladimir; Ferligoj, Anuška (2005). Generalized Blockmodeling. Cambridge University Press. ISBN 0-521-84085-6. <a href="0-521-84085-6" target="_blank">0-521-84085-6</a> <a href="#fnref:20" class="footnote-back-ref">↩</a></li>
<li id="fn:21">Miha Matjašič, Marjan Cugmas and Aleš Žiberna, blockmodeling: An R package for generalized blockmodeling, Metodološki zvezki, 17(2), 2020, 49–66. <a href="/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1" target="_blank">/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1</a> <a href="#fnref:21" class="footnote-back-ref">↩</a></li>
<li id="fn:22">Patrick Doreian, An Intuitive Introduction to Blockmodeling with Examples, BMS: Bulletin of Sociological Methodology / Bulletin de Méthodologie Sociologique, January, 1999, No. 61 (January, 1999), pp. 5–34. <a href="/wiki/Patrick_Doreian" target="_blank">/wiki/Patrick_Doreian</a> <a href="#fnref:22" class="footnote-back-ref">↩</a></li>
<li id="fn:23">Anuška Ferligoj: Blockmodeling, http://mrvar.fdv.uni-lj.si/sola/info4/nusa/doc/blockmodeling-2.pdf Archived 2021-08-12 at the Wayback Machine <a href="/wiki/Anu%C5%A1ka_Ferligoj" target="_blank">/wiki/Anu%C5%A1ka_Ferligoj</a> <a href="#fnref:23" class="footnote-back-ref">↩</a></li>
<li id="fn:24">Doreian, Patrick; Batagelj, Vladimir; Ferligoj, Anuška (2005). Generalized Blockmodeling. Cambridge University Press. ISBN 0-521-84085-6. <a href="0-521-84085-6" target="_blank">0-521-84085-6</a> <a href="#fnref:24" class="footnote-back-ref">↩</a></li>
<li id="fn:25">Miha Matjašič, Marjan Cugmas and Aleš Žiberna, blockmodeling: An R package for generalized blockmodeling, Metodološki zvezki, 17(2), 2020, 49–66. <a href="/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1" target="_blank">/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1</a> <a href="#fnref:25" class="footnote-back-ref">↩</a></li>
<li id="fn:26">Patrick Doreian, An Intuitive Introduction to Blockmodeling with Examples, BMS: Bulletin of Sociological Methodology / Bulletin de Méthodologie Sociologique, January, 1999, No. 61 (January, 1999), pp. 5–34. <a href="/wiki/Patrick_Doreian" target="_blank">/wiki/Patrick_Doreian</a> <a href="#fnref:26" class="footnote-back-ref">↩</a></li>
<li id="fn:27">Žiberna, Aleš (2013). "Generalized blockmodeling of sparse networks". Metodološki zvezki. 10 (2): 99–119. <a href="#fnref:27" class="footnote-back-ref">↩</a></li>
<li id="fn:28">Brusco, Michael; Steinley, Douglas (2011). "A tabu search heuristic for deterministic two-mode blockmodeling". Psychometrika. 76: 612–633. <a href="#fnref:28" class="footnote-back-ref">↩</a></li>
<li id="fn:29">Brusco, Michael; Doreian, Patrick; Steinley, Douglas; Satornino, Cinthia B. (2013). "Multiobjective blockmodeling for social network analysis". Psychometrika. 78 (3): 498–525. doi:10.1007/S11336-012-9313-1. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:29" class="footnote-back-ref">↩</a></li>
<li id="fn:30">Patrick Doreian, Positional Analysis and Blockmodeling. Encyclopedia of Complexity and Systems Science. DOI: https://doi.org/10.1007/978-0-387-30440-3_412 Archived 2023-02-04 at the Wayback Machine. <a href="/wiki/Patrick_Doreian" target="_blank">/wiki/Patrick_Doreian</a> <a href="#fnref:30" class="footnote-back-ref">↩</a></li>
<li id="fn:31">Nooy, Wouter de; Mrvar, Andrej; Batagelj, Vladimir (2018). Exploratory Social Network Analysis with Pajek. Revised and Expanded Edition for Updated Software. Third Edition. Cambridge University Press. ISBN 978-1-108-47414-6. <a href="978-1-108-47414-6" target="_blank">978-1-108-47414-6</a> <a href="#fnref:31" class="footnote-back-ref">↩</a></li>
<li id="fn:32">Nordlund, Carl (2019). "Direct blockmodeling of valued and binary networks: a dichotomization-free approach". Social Networks. 61: 128–143. arXiv:1910.10484. doi:10.1016/j.socnet.2019.10.004. S2CID 204838377. <a href="/wiki/ArXiv_(identifier)" target="_blank">/wiki/ArXiv_(identifier)</a> <a href="#fnref:32" class="footnote-back-ref">↩</a></li>
<li id="fn:33">Arabie, Phipps; Boorman, Scott A.; Levitt, Paul R. (1978). "Constructing Blockmodels: How and Why". Journal of Mathematical Psychology. 17: 21–63. doi:10.2307/270873. JSTOR 270873. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:33" class="footnote-back-ref">↩</a></li>
<li id="fn:34">Batagelj, Vladimir; Mrvar, andrej; Ferligoj, Anuška; Doreian, Patrick (2004). "Generalized Blockmodeling with Pajek". Metodološki zvezki. 1 (2): 455–467. Archived from the original on 2022-03-22. Retrieved 2023-01-07. <a href="https://www.dlib.si/stream/URN:NBN:SI:doc-IK51U9CM/895b643a-1b1d-468f-8970-096c9004202e/PDF" target="_blank">https://www.dlib.si/stream/URN:NBN:SI:doc-IK51U9CM/895b643a-1b1d-468f-8970-096c9004202e/PDF</a> <a href="#fnref:34" class="footnote-back-ref">↩</a></li>
<li id="fn:35">Doreian, Patrick; Batagelj, Vladimir; Ferligoj, Anuška (2005). Generalized Blockmodeling. Cambridge University Press. ISBN 0-521-84085-6. <a href="0-521-84085-6" target="_blank">0-521-84085-6</a> <a href="#fnref:35" class="footnote-back-ref">↩</a></li>
<li id="fn:36">"STATS.ox.ac.uk – Social Network Analysis". Archived from the original on 2021-08-18. Retrieved 2021-08-18. <a href="https://www.stats.ox.ac.uk/~snijders/socnet.htm" target="_blank">https://www.stats.ox.ac.uk/~snijders/socnet.htm</a> <a href="#fnref:36" class="footnote-back-ref">↩</a></li>
<li id="fn:37">Steiber, Steven R. (1981). "Building better blockmodels: A non–hierarchical extension of CONCOR with applications to regression analysis". Mid–American Review of Sociology. VI: 17–40. <a href="#fnref:37" class="footnote-back-ref">↩</a></li>
<li id="fn:38">Batagelj, Vladimir; Mrvar, Andrej; Ferligoj, Anuška; Doreian, Patrick (2004). "Generalized Blockmodeling with Pajek". Metodološki zvezki. 1 (2): 455–467. <a href="#fnref:38" class="footnote-back-ref">↩</a></li>
<li id="fn:39">Batagelj, Vladimir; Mrvar, Andrej; Ferligoj, Anuška; Doreian, Patrick (2004). "Generalized Blockmodeling with Pajek". Metodološki zvezki. 1 (2): 455–467. <a href="#fnref:39" class="footnote-back-ref">↩</a></li>
<li id="fn:40">Batagelj, Vladimir; Mrvar, Andrej; Ferligoj, Anuška; Doreian, Patrick (2004). "Generalized Blockmodeling with Pajek". Metodološki zvezki. 1 (2): 455–467. <a href="#fnref:40" class="footnote-back-ref">↩</a></li>
<li id="fn:41">Žnidaršič, Anja; Doreian, Patrick; Ferligoj, Anuška (2012). "Absent Ties in Social Networks, their Treatments, and Blockmodeling Outcomes". Metodološki zvezki. 9 (2): 119–138. <a href="#fnref:41" class="footnote-back-ref">↩</a></li>
<li id="fn:42">Cran.R–project.org – Package 'blockmodeling' <a href="http://cran.r-project.org/web/packages/blockmodeling/blockmodeling.pdf" target="_blank">http://cran.r-project.org/web/packages/blockmodeling/blockmodeling.pdf</a> <a href="#fnref:42" class="footnote-back-ref">↩</a></li>
<li id="fn:43">Miha Matjašič, Marjan Cugmas and Aleš Žiberna, blockmodeling: An R package for generalized blockmodeling, Metodološki zvezki, 17(2), 2020, 49–66. <a href="/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1" target="_blank">/w/index.php?title=Miha_Matja%C5%A1i%C4%8D&action=edit&redlink=1</a> <a href="#fnref:43" class="footnote-back-ref">↩</a></li>
<li id="fn:44">"STATS.ox.ac.uk – Social Network Analysis". Archived from the original on 2021-08-18. Retrieved 2021-08-18. <a href="https://www.stats.ox.ac.uk/~snijders/socnet.htm" target="_blank">https://www.stats.ox.ac.uk/~snijders/socnet.htm</a> <a href="#fnref:44" class="footnote-back-ref">↩</a></li>
</ol>

Blockmodeling open-in-new

Blockmodeling