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ASA Economic Sociology Section Viviana Zelizer Award (2005-2006 best article) for "Network Dynamics and Field Evolution: The Growth of Interorganizational Collaboration in the Life Sciences," (2005 AJS 110:1132-1205), by Walter W. Powell, Douglas R. White, Kenneth Koput, and Jason Owen-Smith. For this year's award, the committee considered nominations for an outstanding article published in the field of economic sociology in 2005 or 2006. (The award alternates annually between books and articles).

The committee found that this article uses unique data and a dynamic, longitudinal network analysis to develop a set of mechanism-based arguments. It advances several questions central to economic sociology. "We see this piece as groundbreaking; we expect it will continue to be highly useful and frequently cited over the long run in our subfield."

The Alexander von Humboldt Foundation grants up to 100 Humboldt Research Awards annually to scientists and scholars from abroad with internationally recognized academic qualifications. The research award honours the academic achievements of the award winner's lifetime. Distinguished Senior Scientist Research Award

Mathematical Sociology Section, Best Paper Award, 2004 Posting by the American Sociological Association

Citation for James Moody and Douglas White

(Read at the Mathematical Sociology Business Meeting, August 1-4-2004, San Francisco)

This year's Outstanding Article award goes to James Moody and Douglas White for their article "Structural Cohesion and Embeddedness: A Hierarchical Concept of Social Groups" which appeared in the American Sociological Review, February 2003. This paper develops a new graph-theoretic treatment of structural cohesion based on node connectivity, capturing the intuition that more cohesive groups should be better able to survive the loss of group members. Their method detects group structure, identifying both overlapping and hierarchically nested subgroups at different levels of cohesion, and also generates a measure of each actor's embeddedness within the group. Their empirical analyses of high-school friendship networks and corporate interlocking directorates reveal the explanatory power of structural cohesion controlling for other commonly used network measures such as degree and centrality. By offering a more precise conceptualization of the key sociological concepts of "solidarity" and "embeddedness," Moody and White have demonstrated the value of mathematical sociology, and we are pleased to present them with this award.