\begin{table}[htbp] 
\centering 
\caption{\bf Within-Pool Comparisons: NP-Score of State Legislators Who Run vs. Those Who Do Not, Additional Results on Heterogeneity} 
\label{tbl_main_regressions_run_33_more_heterogeneity} 
\begin{tabular}{lcccccc} 
\toprule\toprule 
& \multicolumn{3}{c}{Democrats} & \multicolumn{3}{c}{~Republicans} \\ [.05in] 
Sample                 & Coeff.  & Std. Error  &  \# Obs.  & ~~Coeff.  &  Std. Error  &  \# Obs.  \\ [.01in] 
\midrule 
Large pools            & -0.015 & (0.023) & [3105] & ~~0.107 & (0.024) & [4663] \\ [.01in] 
Small pools            & 0.002 & (0.037) & [793] & ~~0.075 & (0.034) & [1330] \\ [.01in] 
High-variance pools    & -0.000 & (0.034) & [2285] & ~~0.110 & (0.031) & [3759] \\ [.01in] 
Low-variance pools     & -0.016 & (0.016) & [1613] & ~~0.074 & (0.019) & [2234] \\ [.01in] 
\bottomrule 
\end{tabular} 
\end{table} 
