{* *! version 1.0.2  30mar2007}{...}
{phang}
{opt vce(vcetype)} specifies the type of standard error reported, which
includes types that are derived from asymptotic theory, that are robust to
some kinds of misspecification, and that use bootstrap or jackknife methods;
see {helpb xt_vce_options:[XT] {it:vce_options}}. 
{p_end}
