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1\begin{table}[htbp]2\centering\scriptsize3\caption{Task A — MAE (×100) by price segment, horizon 4-6}\label{tab:het_a_segment}4\begin{threeparttable}5\begin{tabular}{lrrr}6\toprule7Model & 250-500k & <250k & >500k \\8\midrule9Naive: municipal median & 24.58 & 54.82 & 40.35 \\10Hedonic OLS & 18.81 & 41.38 & 22.23 \\11Ridge & 18.81 & 41.38 & 22.23 \\12Elastic net & 18.57 & 41.60 & 22.25 \\13SVR (subsample) & 17.85 & 44.09 & 21.16 \\14Random forest & 17.20 & 39.63 & 21.80 \\15XGBoost & 17.78 & 38.75 & 20.54 \\16LightGBM & 17.44 & 38.90 & 20.28 \\17Quantile MLP & 21.46 & 48.19 & 21.59 \\18HSHN (no pooling) & 18.01 & 41.11 & 23.02 \\19HSHN (full pooling) & 18.27 & 41.14 & 23.58 \\20HSHN (partial pooling) & 18.05 & 41.11 & 23.03 \\21\bottomrule22\end{tabular}23\end{threeparttable}24\end{table}25