model diagnostics

From:Leonid Gibiansky Subject: [NMusers] model diagnostics Date: Thu, 01 May 2003 13:07:17 -0400 Dear All, It was unusually quiet recently in the list, let me suggest an idea for discussion: There were recent messages that mentioned model diagnostics other than usual estimates and standard errors of estimates. It would be good to have an expect advise on what to do with COVARIANCE MATRIX OF ESTIMATE CORRELATION MATRIX OF ESTIMATE INVERSE COVARIANCE MATRIX OF ESTIMATE What they offer on top of what we recover from estimates and standard errors of estimates ? Do you always check them ? Any criteria what is good, what is bad ? Practical advices what to do if something looks bad ? Thanks, Leonid