I meant to comment on this before, but forgot. As much as I love to
see new uses for Stata, I would strongly urge you to look at one of
the free programs available for managing BibTex files (e.g.,
tkbibtex, BibTool, or Bibcursed (multi-platform), BibDesk (my
personal favorite; OS X only), or BibEdit or BibDB (Windows only)).
Also, many text editors provide tools for working with files in
BibTeX format. As you know, you can export directly into BibTeX
format from Scholar. Even if you don't actually use BibTeX when
writing, these tools may permit you to accomplish what you need, and
may suggest other things you hadn't thought of.
I'd like to echo Phil's excellent suggestion. BibTeX, like other
elements of TeX/LaTeX, works with plain ASCII text files--unlike some
other bibliographic software which uses proprietary or undocumented
formats. BibTeX format is extremely easy to parse and reformulate
into any other format you might want. Exporting materials to BibTeX
format in order to massage them with Stata would make a great deal of
sense.
