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Social network analysis has emerged as a key technique in modern sociology.It has also gained a significant following in anthropology, biology, communication studies, economics, geography, history, information science, organizational studies, political science, social psychology, development studies, sociolinguistics, and computer science and is now commonly available as a consumer tool.Social network analysis has its theoretical roots in the work of early sociologists such as Georg Simmel and Émile Durkheim, who wrote about the importance of studying patterns of relationships that connect social actors.Social scientists have used the concept of "social networks" since early in the 20th century to connote complex sets of relationships between members of social systems at all scales, from interpersonal to international.It characterizes networked structures in terms of nodes (individual actors, people, or things within the network) and the ties, edges, or links (relationships or interactions) that connect them.Examples of social structures commonly visualized through social network analysis include social media networks, These networks are often visualized through sociograms in which nodes are represented as points and ties are represented as lines.In the 1930s Jacob Moreno and Helen Jennings introduced basic analytical methods.

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Homophily: The extent to which actors form ties with similar versus dissimilar others.Similarity can be defined by gender, race, age, occupation, educational achievement, status, values or any other salient characteristic.Scholars such as Ronald Burt, Kathleen Carley, Mark Granovetter, David Krackhardt, Edward Laumann, Anatol Rapoport, Barry Wellman, Douglas R.White, and Harrison White expanded the use of systematic social network analysis.

Network Closure: A measure of the completeness of relational triads.An individual’s assumption of network closure (i.e.

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