{* *! version 1.0.1  29mar2007}{...}
{phang}
{opt vce(vcetype)} specifies the type of standard error reported, which
includes types that are robust to some kinds of misspecification, that allow
for intragroup correlation, and that use bootstrap or jackknife methods; see
{helpb vce_option:[R] {it:vce_option}}.
{p_end}
