\documentclass[11pt]{article}
\usepackage{stata}
\begin{document}
\section{Displaying Matrices}
\subsection{Example 2: Regression and Variance-Covariance Matrix}

To display the regression result in \LaTeX format, we can use Stata command
{\tt outtex}. The code for generating variance-covariance matrix after regression can be
produced by {\tt outtable} command.
\begin{small}
\begin{verbatim}
. regress write math female read

      Source |       SS       df       MS              Number of obs =     200
-------------+------------------------------           F(  3,   196) =   72.52
       Model |  9405.34864     3  3135.11621           Prob > F      =  0.0000
    Residual |  8473.52636   196  43.2322773           R-squared     =  0.5261
-------------+------------------------------           Adj R-squared =  0.5188
       Total |   17878.875   199   89.843593           Root MSE      =  6.5751

------------------------------------------------------------------------------
       write |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
        math |   .3974826   .0664037     5.99   0.000      .266525    .5284401
      female |    5.44337   .9349987     5.82   0.000      3.59942    7.287319
        read |   .3252389   .0607348     5.36   0.000     .2054613    .4450166
       _cons |   11.89566   2.862845     4.16   0.000     6.249728     17.5416
------------------------------------------------------------------------------

. outtex

%------- Begin LaTeX code -------%

{
\begin{table}[htbp]\centering
 \caption{Estimation results : regress
\label{tabresult regress}}
\begin{tabular}{l c c }\hline\hline
\multicolumn{1}{c}
{\textbf{Variable}}
 & {\textbf{Coefficient}}  & \textbf{(Std. Err.)} \\ \hline
math  &  0.397  & (0.066)\\
female  &  5.443  & (0.935)\\
read  &  0.325  & (0.061)\\
Intercept  &  11.896  & (2.863)\\
\hline
\end{tabular}
\end{table}
}

%------- End LaTeX code -------%

. matrix v=e(V)

. outtable using table2, mat(v) nobox caption("Variance-Covariance Matrix") format(%6.4f)
\end{verbatim}
\end{small}

Here is the real output in \LaTeX format.

\begin{table}[htbp]\centering
 \caption{Estimation results : regress
\label{tabresult regress}}
\begin{tabular}{l c c }\hline\hline
\multicolumn{1}{c}
{\textbf{Variable}}
 & {\textbf{Coefficient}}  & \textbf{(Std. Err.)} \\ \hline
math  &  0.397  & (0.066)\\
female  &  5.443  & (0.935)\\
read  &  0.325  & (0.061)\\
Intercept  &  11.896  & (2.863)\\
\hline
\end{tabular}
\end{table}

\input{table2}
\end{document}