The ivreg2 package of Baum, Schaffer, Stillman has been updated from
the version published in Stata Journal 4(2) to correct several small
bugs in the handling of F statistics and option names. The help file
has also been updated to clarify the interaction of small sample d.f.
adjustments and the computation of F statistics. We thank David Roodman
for pointing out some of these issues.
The updated version is available for Stata 7 and 8.x via ssc install