I'm trying to shorten this table
but without any success. This table is too big for the page. It's supposed to contain 8 columns and not 6. I wrote the code via Stata software. For your information, this is the relevant code.
\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Individual Effort}
\begin{tabular}{l*{8}{c}}
\hline\hline
&\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}&\multicolumn{1}{c}{(5)}&\multicolumn{1}{c}{(6)}&\multicolumn{1}{c}{(7)}&\multicolumn{1}{c}{(8)}\\
&\multicolumn{1}{c}{Model 1}&\multicolumn{1}{c}{Model 2}&\multicolumn{1}{c}{Model 3}&\multicolumn{1}{c}{Model 4}&\multicolumn{1}{c}{Model 5}&\multicolumn{1}{c}{Model 6}&\multicolumn{1}{c}{Model 7}&\multicolumn{1}{c}{Model 8}\\
\hline
Future & -0.00346\sym{***}& -0.0139\sym{***}& -0.00426\sym{***}& -0.0133\sym{***}& & -0.00705\sym{***}& -0.0102\sym{***}& -0.0102\sym{***}\\
& (-3.69) & (-12.67) & (-4.55) & (-12.13) & & (-7.37) & (-8.61) & (-8.61) \\
[1em]
Favourite's previous games& 0.0129\sym{**} & 0.0235\sym{***}& 0.0148\sym{***}& 0.0234\sym{***}& & 0.0212\sym{***}& 0.0237\sym{***}& 0.0237\sym{***}\\
& (3.02) & (5.45) & (3.47) & (5.46) & & (4.85) & (5.39) & (5.39) \\
[1em]
Underdog's previous games& -0.0121\sym{*} & -0.0177\sym{***}& -0.0142\sym{**} & -0.0186\sym{***}& & -0.0219\sym{***}& -0.0230\sym{***}& -0.0230\sym{***}\\
& (-2.37) & (-3.47) & (-2.79) & (-3.66) & & (-4.44) & (-4.67) & (-4.67) \\
[1em]
Heterogeneity& -0.00639\sym{***}& -0.00525\sym{***}& -0.00616\sym{***}& -0.00520\sym{***}& -0.00522\sym{***}& -0.00463\sym{***}& -0.00439\sym{***}& -0.00439\sym{***}\\
& (-32.66) & (-25.65) & (-30.74) & (-24.88) & (-15.42) & (-14.04) & (-13.40) & (-13.40) \\
[1em]
Spread & 0.0000402 & -0.00157 & -0.00109 & -0.00203 & -0.00107 & -0.00376 & -0.00364 & -0.00364 \\
& (0.03) & (-1.02) & (-0.70) & (-1.32) & (-1.43) & (-1.81) & (-1.78) & (-1.78) \\
_cons & 11.33\sym{*}& 12.52\sym{}& 9.548\sym{} & 10.41\sym{} & 11.35\sym{}& 11.77\sym{}& 12.14\sym{}& 12.14\sym{}\
& (52.05) & (55.29) & (2.05) & (2.24) & (67.09) & (64.19) & (63.73) & (63.73) \
\hline
(N) & 36194 & 36194 & 36194 & 36194 & 37060 & 36194 & 36194 & 36194 \
\hline\hline
\multicolumn{9}{l}{\footnotesize \textit{t} statistics in parentheses}\
\multicolumn{9}{l}{\footnotesize \sym{} (p<0.05), \sym{} (p<0.01), \sym{*} (p<0.001)}\
\end{tabular}
\end{table}
This is the main code on Overleaf:
\documentclass{article}
\usepackage[utf8]{inputenc}
\title{project1}
\author{sadas}
\date{January 2023}
\usepackage{graphicx}
\usepackage{booktabs}
\usepackage{graphics}
\usepackage{subcaption}
\usepackage{mwe}
\begin{document}
\input{table3a.tex}
\end{document}



graphicsif you've already loaded the more powerfulgraphicx– samcarter_is_at_topanswers.xyz Jan 15 '23 at 19:51