Philip: very interesting paper with some disturbing results for PISA rankings fans -- many thanks for the reference. (I recall struggling with the PISA Technical Report about 10 years ago ...)
Yes! Intriguing that "draws from an (estimated) distribution of a latent trait" have now morphed into being treated as "imputed values of a missing variable". [It's the conflation of "missing" and "latent"!] But, as I said, the pv suite does appear to do this. I put such reservations aside in my attempts to try and provide a "solution" to the problem in this case which I interpreted as "how to get the data into Stata and recognised as MI?" I guess that that is what the SAS and SPSS code that Vincent cites does as well.
it is interesting/amusing to think about the (implied) rationale for imputing all values of a variable that was completely missing in the first place...
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