\begin{table}[htbp]
\centering\scriptsize
\caption{Task A — MAE (×100) by price segment, horizon 4-6}\label{tab:het_a_segment}
\begin{threeparttable}
\begin{tabular}{lrrr}
\toprule
Model & 250-500k & <250k & >500k \\
\midrule
Naive: municipal median & 24.58 & 54.82 & 40.35 \\
Hedonic OLS & 18.81 & 41.38 & 22.23 \\
Ridge & 18.81 & 41.38 & 22.23 \\
Elastic net & 18.57 & 41.60 & 22.25 \\
SVR (subsample) & 17.85 & 44.09 & 21.16 \\
Random forest & 17.20 & 39.63 & 21.80 \\
XGBoost & 17.78 & 38.75 & 20.54 \\
LightGBM & 17.44 & 38.90 & 20.28 \\
Quantile MLP & 21.46 & 48.19 & 21.59 \\
HSHN (no pooling) & 18.01 & 41.11 & 23.02 \\
HSHN (full pooling) & 18.27 & 41.14 & 23.58 \\
HSHN (partial pooling) & 18.05 & 41.11 & 23.03 \\
\bottomrule
\end{tabular}
\end{threeparttable}
\end{table}