\begin{tabular}{r|ccc|cc}
\toprule
            & \multicolumn{3}{c}{Group 1}    & \multicolumn{2}{c}{Group 2} \\
            & (1)      & (2)      & (3)      & (4)          & (5)          \\ \hline
(Intercept) &  19.978* &   15.809 &   14.167 &       11.834 &       11.011 \\
            & (11.688) & (11.084) & (11.519) &      (8.535) &     (11.704) \\
     Raises & 0.691*** &   0.379* &    0.352 &       -0.026 &       -0.033 \\
            &  (0.179) &  (0.217) &  (0.224) &      (0.184) &      (0.202) \\
   Learning &          &  0.432** &   0.394* &        0.246 &        0.249 \\
            &          &  (0.193) &  (0.204) &      (0.154) &      (0.160) \\
 Privileges &          &          &    0.105 &       -0.103 &       -0.104 \\
            &          &          &  (0.168) &      (0.132) &      (0.135) \\
 Complaints &          &          &          &     0.691*** &     0.692*** \\
            &          &          &          &      (0.146) &      (0.149) \\
   Critical &          &          &          &              &        0.015 \\
            &          &          &          &              &      (0.147) \\ \hline
          N &       30 &       30 &       30 &           30 &           30 \\
      $R^2$ &    0.348 &    0.451 &    0.459 &        0.715 &        0.715 \\
\bottomrule
\end{tabular}