\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Within-Legislator Results (By Congress), 2011-2014 \label{TableFEByCongMRP112113}}
\begin{tabular}{l*{4}{c}}
\hline\hline
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                    &\multicolumn{1}{c}{Real Spending}&\multicolumn{1}{c}{Real Spending}&\multicolumn{1}{c}{Real Spending}&\multicolumn{1}{c}{Real Spending}\\
\hline
Electoral Security (MRP)&    -21177.0\sym{**} &    -21950.5\sym{**} &                     &                     \\
                    &    (7899.0)         &    (7884.5)         &                     &                     \\
[1em]
Electoral Security (Cook)&                     &                     &    -39455.6\sym{***}&    -40344.4\sym{***}\\
                    &                     &                     &   (10233.3)         &   (10375.4)         \\
[1em]
DW-Nominate (First Dim.)&                     &    279559.3\sym{**} &                     &    207524.6\sym{+}  \\
                    &                     &  (100148.7)         &                     &  (125417.6)         \\
[1em]
Retiring            &                     &    -18592.4         &                     &    -23016.5         \\
                    &                     &   (18198.5)         &                     &   (17770.6)         \\
[1em]
House Tenure        &                     &     -2392.4\sym{**} &                     &     -3456.6\sym{***}\\
                    &                     &     (844.5)         &                     &     (939.5)         \\
\hline
\(R^{2}\)           &       0.431         &       0.436         &       0.440         &       0.445         \\
Observations        &\num[group-separator={,}]{889}         &\num[group-separator={,}]{888}         &\num[group-separator={,}]{889}         &\num[group-separator={,}]{888}         \\
Number of House Members&\num[group-separator={,}]{538}         &\num[group-separator={,}]{538}         &\num[group-separator={,}]{538}         &\num[group-separator={,}]{538}         \\
Member Fixed Effects&         Yes         &         Yes         &         Yes         &         Yes         \\
Congress Fixed Effects&         Yes         &         Yes         &         Yes         &         Yes         \\
\hline\hline
\multicolumn{5}{l}{\footnotesize Heteroskedasticity robust standard errors clustered at the member level in parentheses}\\
\multicolumn{5}{l}{\footnotesize \sym{+} \(p<0.1\), \sym{*} \(p<0.05\), \sym{**} \(p<0.01\), \sym{***} \(p<0.001\)}\\
\end{tabular}
\end{table}
