\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Within-Legislator Results (By Quarter) Fourth Quarter Measure, 2009-2016 \label{TableFEByQMRPProspQ4}}
\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 (Prosp. MRP)&     -2366.6\sym{*}  &     -2387.2\sym{**} &                     &                     \\
                    &     (924.8)         &     (924.2)         &                     &                     \\
[1em]
Electoral Security (Prosp. Cook)&                     &                     &     -5703.8\sym{**} &     -5466.3\sym{**} \\
                    &                     &                     &    (1752.3)         &    (1734.3)         \\
[1em]
DW-Nominate (First Dim.)&                     &     26571.3\sym{*}  &                     &     23213.7\sym{*}  \\
                    &                     &   (11234.2)         &                     &   (11526.0)         \\
[1em]
Retiring            &                     &     -1286.8         &                     &     -1661.4         \\
                    &                     &    (1983.2)         &                     &    (1953.2)         \\
[1em]
House Tenure        &                     &      4585.0         &                     &      4043.3         \\
                    &                     &    (4264.0)         &                     &    (3925.4)         \\
[1em]
Majority            &                     &      -115.5         &                     &      -354.2         \\
                    &                     &     (948.9)         &                     &     (941.8)         \\
\hline
\(R^{2}\)           &       0.199         &       0.200         &       0.200         &       0.200         \\
Observations        &\num[group-separator={,}]{11329}         &\num[group-separator={,}]{11321}         &\num[group-separator={,}]{11329}         &\num[group-separator={,}]{11321}         \\
Number of House Members&\num[group-separator={,}]{693}         &\num[group-separator={,}]{693}         &\num[group-separator={,}]{693}         &\num[group-separator={,}]{693}         \\
Member Fixed Effects&         Yes         &         Yes         &         Yes         &         Yes         \\
Quarter 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}
