\begin{table}[htbp]\centering\footnotesize
\caption{Within-region concentration of catalogue sizes}\label{tab:h3_region}
\begin{adjustbox}{max width=\textwidth}
\begin{tabular}{lrrr}\toprule
Region & Stores & Gini [95\% CI] & Top-10\% share \\\midrule
Outaouais & 36 & 0.922 [0.632; 0.937] & 0.946 \\
Capitale-Nationale & 126 & 0.891 [0.751; 0.929] & 0.866 \\
Gaspésie--Îles-de-la-Madeleine & 30 & 0.891 [0.472; 0.912] & 0.876 \\
Montérégie & 190 & 0.890 [0.724; 0.925] & 0.854 \\
Centre-du-Québec & 61 & 0.885 [0.519; 0.921] & 0.861 \\
Laval & 25 & 0.830 [0.492; 0.868] & 0.809 \\
Estrie & 152 & 0.823 [0.680; 0.882] & 0.756 \\
Chaudière-Appalaches & 102 & 0.815 [0.661; 0.857] & 0.776 \\
Laurentides & 99 & 0.810 [0.652; 0.871] & 0.725 \\
Abitibi-Témiscamingue & 21 & 0.806 [0.587; 0.850] & 0.795 \\
Bas-Saint-Laurent & 39 & 0.806 [0.447; 0.854] & 0.776 \\
Saguenay--Lac-Saint-Jean & 97 & 0.803 [0.618; 0.846] & 0.736 \\
Montréal & 237 & 0.782 [0.675; 0.843] & 0.689 \\
Lanaudière & 66 & 0.765 [0.645; 0.809] & 0.679 \\
Mauricie & 31 & 0.730 [0.495; 0.792] & 0.701 \\
Côte-Nord & 16 & 0.517 [0.318; 0.565] & 0.455 \\
Nord-du-Québec & 3 & -- & -- \\
\bottomrule\end{tabular}
\end{adjustbox}
\begin{minipage}{0.95\textwidth}\vspace{2pt}\footnotesize\textit{Notes:} 500 store-bootstrap resamples per region; regions with fewer than five stores omitted.\end{minipage}
\end{table}