of the first and second East York studies, showing that reciprocity (like social support) is much more of a tie phenomenon than a social network phenomenon and that the frequency and supportiveness of interpersonal contact before the Internet was non-linearly associated with residential (and workplace) distance. Wellman has edited Networks in the Global Village (1999), a book of original articles about personal networks around the world. In 2007, he edited a special issue, "The Network is Personal" of the journal, Social Networks (vol. 29, no. 3, July), containing analyses from Canada, France, Germany and Iran. Social network theory Concomitant with his empirical work, Wellman has contributed to the theory of social network analysis. The most comprehensive statement is in his introductory article to Social Structures, co-edited with the late S.D. Berkowitz. This work reviews the history of social network thought, and suggests a number of basic principles of social network analysis. More recent and more focused theoretical work has discussed the "glocalization" of contemporary communities (simultaneously "global" and "local") and the rise of "networked individualism" – the transformation from group-based networks to individualized networks. American Sociological Association career achievement award winner Harrison White notes: "Barry Wellman stands out as having devoted an entire career to exploring and documenting natural social worlds in network terms." Social network methods Wellman's methodological contributions have been for the analysis of ego-centered or "personal" networks – defined from the standpoint of an individual (usually a person). As batches of personal networks are often studied, this calls for somewhat different techniques than the more common social network practice of analyzing a single large network. A 2007 paper, co-authored by Wellman (with Bernie Hogan and Juan-Antonio Carrasco), has discussed alternatives in gathering personal network data. A paper with Kenneth Frank showed how to tackle the problem of simultaneously analyzing personal network data on the two distinct levels of ties and networks. "Neighboring in Netville" has been cited as the only published study of personal networks from a known roster of potential network members. The most widely cited papers are the simplest: co-authored guides to analyzing personal network data while using the statistical software packages SAS and SPSS. Other work by Wellman with Howard D. White and associates has examined how to link social network analysis with the scientometric study of citation networks. This research has shown that scholarly friends do not necessarily cite each other, but that