Dear all, I am wondering if someone can provide references for the condition number thresholds we are seeing (<1000) etc. Also, the other way I have seen when I was in graduate school that condition number <10^n (n- number of parameters) is OK. Personally, I am depending on correlation matrix rather than condition number and have seen cases where condition number is large (according to 1000 rule but less than 10^n rule) but correlation matrix is fine.
I want to provide these for my teaching purposes and any help is greatly appreciated. Regards, Ayyappa
