{* *! version 1.0.2  30mar2007}{...}
{phang}
{opt vce(vcetype)} specifies the type of standard error reported.
{it:vcetype} may be either {opt boot:strap} or {opt jack:knife};
see {helpb xt_vce_options:[XT] {it:vce_options}}. 
{p_end}
