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The inclusion of such marriages, represented in the graph by self-loops, is essential to compute more accurate measures of centrality. In this paper, we discuss various procedures for incorporating these links into the analysis, with the requirement that they be compatible with the use of already available social network analysis software. We then apply them to two historical marriage networks, one from the Republic of Venice and the other from Taiwan. By comparing centrality measures for the baseline and modified networks, we found that the most satisfactory of the proposed methods is the one that duplicate nodes of families with intra-family marriages and adds new edges that link these duplicated nodes to all the families to which the original node was connected. This procedure is computationally simple and conceptually sound, making it a useful tool for analyzing marital networks.<\/jats:p>","DOI":"10.1007\/s42001-023-00245-4","type":"journal-article","created":{"date-parts":[[2024,1,25]],"date-time":"2024-01-25T17:32:00Z","timestamp":1706203920000},"page":"425-449","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Intra-family links in the analysis of marital networks"],"prefix":"10.1007","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1385-9741","authenticated-orcid":false,"given":"J. J.","family":"Merelo","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6380-6795","authenticated-orcid":false,"given":"M. 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