Affinity in terms ofsociology, refers to "kinship of spirit",interest and otherinterpersonal commonalities. Affinity is characterized by high levels ofintimacy and sharing, usually in closegroups, also known asaffinity groups. It differs from affinity inlaw andCatholic canon law which generally refer to themarriage relationship. Social affinity is generally thought of as "marriage" toideas,ideals andcauses shared by a tightcommunity of people.

InSocial affinity in a modern world,Boston College professor, James Allan Vela-McConnell explores theemergence of the concept of "social affinity" bridgingclassical sociology andsocial psychology, identifying "the notion of social cohesion" based upon the sentiment of moral obligation.^[1]

Max Weber articulated "Elective Affinities".^[2]

Affinity is shown or demonstrated by an individual identifying with a subculture, ethnicity, or other groups, within a larger national culture. Self-identification with a group is a valid form of expressing affinity.^[3][4]

• Vela-McConnell, James A. (1999).Who Is My Neighbor?: Social Affinity in a Modern World. SUNY Press.ISBN 978-0-7914-4312-5.ProQuest 304335982.
• Panigrahy, Rina;Najork, Marc; Xie, Yinglian (2012). "How user behavior is related to social affinity".Proceedings of the fifth ACM international conference on Web search and data mining - WSDM '12. p. 713.CiteSeerX 10.1.1.651.2517.doi:10.1145/2124295.2124379.ISBN 978-1-4503-0747-5.S2CID 15300350.
• Shin, Eui Hang; Chin, Seung Kwon (1 March 1989). "Social affinity among top managerial executives of large corporations in Korea".Sociological Forum.4 (1):3–26.doi:10.1007/BF01112614.JSTOR 684433.S2CID 154932912.INIST 6548387.
• Hong, Minsung; Jung, Jason J.; Camacho, David (3 April 2017). "GRSAT: A Novel Method on Group Recommendation by Social Affinity and Trustworthiness".Cybernetics and Systems.48 (3):140–161.doi:10.1080/01969722.2016.1276770.S2CID 31874810.
• Briseno-Jaramillo, M.; Ramos-Fernández, G.; Palacios-Romo, T. M.; Sosa-López, J. R.; Lemasson, A. (7 December 2018). "Age and social affinity effects on contact call interactions in free-ranging spider monkeys".Behavioral Ecology and Sociobiology.72 (12):1–17.doi:10.1007/s00265-018-2615-2.JSTOR 45132533.S2CID 54452369.ProQuest 2151638257.
• Reinhardt, Delphine; Engelmann, Franziska; Moerov, Andrey; Hollick, Matthias (2015). "Show me your phone, I will tell you who your friends are".Proceedings of the 14th International Conference on Mobile and Ubiquitous Multimedia. pp. 75–83.doi:10.1145/2836041.2836048.ISBN 978-1-4503-3605-5.S2CID 5910730.
• Beach, Frank A. (1 January 1970). "Coital Behaviour in Dogs. VIII. Social Affinity, Dominance and Sexual Preference in the Bitch".Behaviour.36 (1–2):131–147.doi:10.1163/156853970X00088.JSTOR 4533323.
• Luebker, Malte (30 July 2021)."Can the structure of inequality explain fiscal redistribution? Revisiting the social affinity hypothesis"(PDF).Socio-Economic Review.19 (2):735–763.doi:10.1093/ser/mwz005.

• Using Group Composition Data to Measure Social Affinity: A New MethodJohn Pepper,Santa Fe Institute

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