\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Difference-in-Differences (MI): Support for Trade \label{maineff:did:mi}}
\begin{tabular}{l*{2}{c}}
\hline\hline
                    &\multicolumn{1}{c}{(1)}   &\multicolumn{1}{c}{(2)}   \\
                    &        b/se   &        b/se   \\
\hline
\hline
Exporters vs. Import-Competing              &      11.380   &      12.150   \\
             &      (5.09)   &      (4.75)   \\
exim_p              &       0.040   &       0.020   \\
Exporters vs. Non-Traders              &      15.850   &      17.600   \\
             &      (4.52)   &      (4.58)   \\
exno_p              &       0.000   &       0.000   \\
Exporters vs. Public              &      13.330   &      14.420   \\
             &      (5.06)   &      (4.98)   \\
expu_p              &       0.010   &       0.010   \\
Import-Competing vs. Non-Traders              &       4.470   &       5.450   \\
             &      (5.54)   &      (5.33)   \\
imno_p              &       0.430   &       0.320   \\
Import-Competing vs. Public              &       1.950   &       2.270   \\
             &      (5.32)   &      (5.33)   \\
impu_p              &       0.720   &       0.670   \\
Non-Traders vs. Public              &      -2.520   &      -3.190   \\
             &      (5.02)   &       (4.9)   \\
nopu_p              &       0.620   &       0.520   \\
\hline\hline
\multicolumn{3}{l}{\footnotesize Difference-in-Differences (DID) between sectors, calculated from OLS estimates reported in Table A17. Control and Public Sector are reference categories.}\\
\multicolumn{3}{l}{\footnotesize * p<.1, ** p<.05, *** p<.01}\\
\end{tabular}
\end{table}
