\begin{table}[H]
\centering
\begin{threeparttable}
\caption{Official-policy mechanism benchmark}
\label{tab:comparators}
\tiny
\setlength{\tabcolsep}{1.8pt}
\begin{tabularx}{\textwidth}{>{\raggedright\arraybackslash}X>{\raggedright\arraybackslash}p{0.06\textwidth}>{\raggedright\arraybackslash}p{0.11\textwidth}>{\centering\arraybackslash}p{0.08\textwidth}>{\centering\arraybackslash}p{0.10\textwidth}>{\centering\arraybackslash}p{0.09\textwidth}>{\centering\arraybackslash}p{0.08\textwidth}>{\centering\arraybackslash}p{0.09\textwidth}}
\toprule
Jurisdiction & Level & Aircraft class & \shortstack{Min.\\flights} & \shortstack{Route\\award} & \shortstack{Route\\intensity} & \shortstack{Flight\\rate} & \shortstack{Exposure\\term} \\
\midrule
Shenzhen & city & light/small & 5,000 & 200,000 & 40.0 & 20 & No \\
Shenzhen & city & medium/large & 1,000 & 350,000 & 350.0 & 40 & No \\
Qianjiang & district & light/small & 300 & 10,000 & 33.3 & -- & No \\
Qianjiang & district & medium/large & 100 & 50,000 & 500.0 & -- & No \\
Tianhe & district & large & 300 & 300,000 & 1000.0 & -- & No \\
Tianhe & district & medium & 300 & 200,000 & 666.7 & -- & No \\
Tianhe & district & small & 300 & 100,000 & 333.3 & -- & No \\
Hangzhou & city & light/small & 2,500 & 100,000 & 40.0 & 20 & No \\
Hangzhou & city & medium/large & 1,000 & 400,000 & 400.0 & 200 & No \\
\bottomrule
\end{tabularx}
\begin{tablenotes}
\footnotesize
\item Notes: Official policies were purposively selected because they disclose logistics-route thresholds and amounts. The benchmark is not a representative national sample. ``Exposure-priced amount'' asks whether exposed population, sensitive facilities, measured noise, complaints, or distributional vulnerability changes the positive reward amount.
\end{tablenotes}
\end{threeparttable}
\end{table}