Proc Mixed - Covariance structure and Random effects

[Babloo]

May I request someone to explain (short summary) the Covariance structure and Fixed and Random effects in Proc Mixed? How to interpret 'covariance paramater estimates' in output?

Thanks!

[lvm]

A short summary is impossible. I highly recommend you read the book SAS for Mixed Models, 2nd edition (2006), by Littell et al.

[SteveDenham]

Thank you, Larry.  That is the best answer that can be given for this question.

Steve Denham