***** To join INSNA, visit http://www.insna.org ***** Assuming i am doing a network analysis on nominations among a class of 20 students. If every student nominates 19 others, my maximum number of ties will be 20 x 19. But in my dataset students nominated varying number of their peers - ie, some 8, some 5, some 10, some 19. I have set up my dataset in spss as follows: student name ==== nominee===helps with assignment e.g., 01 === 02 ====1 01 === 03 ====1 01 === 04 ====0 01 === 05 ====1 02 === 01 ====1 02 === 03 ====0 When I am doing my analysis (such as Anova or crosstabluation) in Spss, I focus on only valid ties - that is those that have a 1, code the 0s as missing cases. So respondent 01 for example will only have 3 valid cases since her 01 - 04 tie is set to missing. However under QAP regression in UCINET, they are counted as valid responses, and the total number of valid cases is 20x19. For a complete network with directed ties, should regression and other multivariate analysis be based on the total number of possible ties, i.e, N(N-1) or the total number of actual ties - which may be less than but not greater than N(N-1)? Is there any substantive validation for one versus the other? have a lovely weekend .... cheers - PintoN --------------------------------- Yahoo! Mail Mobile Take Yahoo! Mail with you! Check email on your mobile phone. _____________________________________________________________________ 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.