\begin{tabular}{c|c|ccc|ccc}
	 & \begin{tabular}{c}Average\\ number of firms\end{tabular} &
	\begin{tabular}{c}Consumer\\ surplus\end{tabular} &
	\begin{tabular}{c}Producer\\ surplus\end{tabular} &
	\begin{tabular}{c}Total\\ surplus\end{tabular} &
	 C1 & C4 & HHI\\\hline\hline
	 OE 0-dom firms & 8.00 & 102.31 & 25.58 & 127.89 & 0.13 & 0.25 & 1249.08\\
	 OE 1-dom firm & 8.00 & 102.43 & 25.62 & 128.05 & 0.13 & 0.26 & 1249.58\\
	 OE 2-dom firms & 8.00 & 440.78 & 110.54 & 551.32 & 0.14 & 0.26 & 1252.65\\\hline
\end{tabular}
