\documentclass{article}
\usepackage{booktabs}
\usepackage{adjustbox}
\begin{document}

Table 1 shows output using \texttt{esttab}. Notice that Table 1 extends beyond the width of this text, and can even extend beyond the print margins of the page.

\input{esttab_output}

Table 2 shows output produced by \texttt{estwide}. Note that it is scaled to the width of this text. Additionally, the notes at the bottom do not require manual alignment.

\input{estwide_output}

Table 3 replicates Table 2, but is rendered with an adjusted \texttt{arraystretch} for an extra 25\% vertical space, in case you think Table 2 looks too squished.

\renewcommand{\arraystretch}{1.25}
\input{estwide_output}
\renewcommand{\arraystretch}{1.0}

\end{document} 