\begin{tabular}{*{5}{l}}
\hline
                  & \multicolumn{2}{c}{Not Centered} & \multicolumn{2}{c}{Centered}   \tabularnewline
                   &Estimate  &(S.E.)    &Estimate  &(S.E.)  \tabularnewline
 \hline
 \hline
   (Intercept)     &-424.260   &   (379.001) &1281.753***   &   (12.962) \tabularnewline
   x1              &6.523   &   (  7.209)   & .        &         \tabularnewline
   x2              &7.355   &   (  7.362)   & .        &         \tabularnewline
   x1:x2           &0.392**   &   (  0.139)   & .        &         \tabularnewline
   x1c               & .        &         &26.406***   &   ( 1.377) \tabularnewline
   x2c               & .        &         &27.155***   &   ( 1.349) \tabularnewline
   x1c:x2c           & .        &         &0.392**   &   ( 0.139) \tabularnewline
 \hline
 N                 &400       &        &400       &        \tabularnewline
 RMSE             &257.191         & &257.191         & \tabularnewline
 $R^2$             &0.703         & &0.703         & \tabularnewline
 adj $R^2$         &0.701         & &0.701         & \tabularnewline
 \hline
\hline
 
 \multicolumn{5}{c}{${*  p}\le 0.05$${*\!\!*  p}\le 0.01$${*\!\!*\!\!*  p}\le 0.001$}\tabularnewline
 \end{tabular}