An updated version of a command -- pwmc -- is now available for Stata users via SSC and is discussed (and described more fully) on Statalist (here). The command performs pairwise comparisons of means with unequal variances.
As the discussion makes clear, the pwmc command differs from other, related commands with the mcompare() option, such as margins with the pwcompare option, as it (pwmc) does not assume equal variances where the alternatives typically do.
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