***** To join INSNA, visit http://www.insna.org ***** Hello, I was wondering if anyone can point me to literature on QAP procedures that calculate Pearson Correlation, Simple Matching and Jaccard Coefficient between two adjacency matrices especially for very large affiliation datasets (as in UCINET). I am looking for something that explains how each is done and the strength and weakness of each. I have affiliation data on the existence/absence of a relationship for some 3000 people on two levels but not on strength of the relationship.The matrices are very sparse. What are the challenges of these methods with sparse matrices? Thank you very much for your help, Zelalem _____________________________________________________________________ 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.