***** To join INSNA, visit http://www.insna.org ***** Hello All, I'm looking for some advice on a method for transforming actor level data into an adjacency matrix. Specifically, I have data of firms and their directors and I'm trying to construct a 2-mode network of firms and shared directors. The data are organized so that each row is a director (with a unique ID that is consistent throughout the data) and a variable indicating their firm. So if Director A serves on the board of three firms he/she appears in the data three times, three separate rows, and the value of the firm variable is different for each appearance, indicating which firm they serve on. I'm trying to figure out a strategy for converting this into a 2-mode matrix. If anyone has any advice on this, or can recommend a resource for help in constructing matrices, I would greatly appreciate it. Thank you -- Richard Benton Graduate Student and Instructor Department of Sociology and Anthropology North Carolina State University _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.