The “small-world” theory, which stems from research in social network analysis over 30 years ago, deals with the short distances between two arbitrary persons through intermediate chains of acquaintances. They then applied cluster analysis to reveal a hyperlinked network in which financial Web sites were found to be in the most central position. Park, Barnett, and Nam examined Korea's 152 most popular Web sites and defined the affiliation among the Web sites based on interdomain hypertext links. This network of Web sites provided a unique insight into the character of the Zapatista's phenomenal success. The study collected data on links to the Zapatista Web site and mapped these links into a Zapatista network on the Web. Garrido and Halavais studied the networks of support for the Zapatista movement, a contemporary social movement in which the Internet played a central role. Therefore, social network analysis has been used to study Web hyperlinks. As the Web connects people and organizations, it can host social networks. Social network analysis, a research method developed primarily in sociology and communication science, focuses on patterns of relations among people and among groups such as organizations and states. Liwen Vaughan, in Encyclopedia of Social Measurement, 2005 Social Network Analysis Using Web Hyperlink Data
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