\begin{tabular}{lrrrrrrrrr}
\toprule
Submarket & Median $\hat\sigma$ & M2 & M7 & M8a & M13 & M0 & M10 & M11b & M12 \\
\midrule
homogeneous & 0.121 & 13.9 & 10.2 & 10.5 & 9.2 & 9.0 & 12.1 & 7.5 & 7.4 \\
intermediate & 0.252 & 19.0 & 13.9 & 14.3 & 12.1 & 11.9 & 14.3 & 9.5 & 9.5 \\
heterogeneous & 0.400 & 22.8 & 16.4 & 16.9 & 14.3 & 13.6 & 15.7 & 10.4 & 10.4 \\
\bottomrule
\end{tabular}