\begin{Schunk}
\begin{Sinput}
 round(sqrt(diag(vcov(mod2))), 3)
\end{Sinput}
\begin{Soutput}
(Intercept)       satis     jobperf      tenure         age 
      0.448       0.041       0.038       0.018       0.010 
\end{Soutput}
\end{Schunk}
