I'm trying to add a unique table displaying the regression results in my working paper. However, I'm facing three issues: i) I'm unable to insert "Dependent Variable: y$_{it}" as a caption just above the table.
ii) I'm struggling to include the legend regarding the p-values and the text "In this table, we present the average marginal effects, with robust standard errors displayed within parentheses. All the regression models include a full set of year dummies" just below the table.
iii) The table is too wide and needs to be adjusted to fit on the sheet.
My attempt as follows
\documentclass[12pt,fleqn,a4paper]{article}
\usepackage{caption}
\usepackage{booktabs}
\usepackage{array}
\usepackage{amsmath}
\begin{document}
\begin{table}[htbp]
\centering
\caption{%
Dependent Variable: y${it}$
}
\vspace{0.5em}
\begin{tabular}{ccccccc}
\toprule
\textbf{Variable} & \textbf{Model 1} & \textbf{Model 2} & \textbf{Model 3} & \textbf{Model 4} & \textbf{Model 5} & \textbf{Model 6} \
\midrule
k${it}$ & & & & & & \
& & & & & & \
h$_{it}$ & & & & & &\
& & & & & & \
Americas & & & & & &\
& & & & & & \
East Asia and South Asia and Pacific & & & & & & \
& & & & & & \
Europe and Central Asia & & & & & & \
Middle East and North Africa & & & & & & \
& & & & & & \
\midrule
Sample & & & & & & \
N & & & & & &\
McFaddenR$^{2}$ & & & & & & \
\bottomrule
\addlinespace[1ex]
\multicolumn{4}{l}{\textsuperscript{*}$p<0.01$, \textsuperscript{}$p<0.05$, \textsuperscript{*}$p<0.1$. In this table, we present the average marginal effects, with robust standard errors displayed within parentheses. All the regression models include a full set of year dummies.}
\label{probit1}
\end{tabular}
\end{table}
\end{document}

ccolumns that do not admit breaking text into lines. (btw, don't usey$_it$---$\mathrm{y}_{it}$is much better to have a non-italic y). – Rmano Oct 01 '23 at 17:20