\begin{table}[htbp]\centering\small
\caption{Descriptive store-certification price contrast (not a test of H6)}\label{tab:cert}
\begin{adjustbox}{max width=\textwidth}
\begin{tabular}{lr}\toprule
Statistic & Value \\\midrule
Observations / stores / certified stores & 288\,663 / 1\,264 / 491 \\
Certified store, log price difference within category (SE, store-clustered) & -0.204 (0.138) \\
\bottomrule\end{tabular}
\end{adjustbox}
\begin{minipage}{0.95\textwidth}\vspace{2pt}\footnotesize\textit{Notes:} descriptive store-certification contrast (Aliments du Québec / Les Produits du Québec), category FE, store-clustered SE — NOT a test of H6\end{minipage}
\end{table}