Hi, thanks for the post. I am running into the same issue. Can I have two related questions? 1. I notice that the t-stats for the coefficients from (i) the de-mean method and (ii) the PROC SURVEYREG with Class option are slightly different. Why? and how do we control for that?  2. The link to the reliable code is missing. Do you have the new link ? Thanks ... View more

When you work with data the size that I do, character storage requirements are a massive cost. That is why numerics are a great ID variable. ... View more