我在处理下表时遇到了上述错误。我找不到多余的“\”或缺少的“\”。您能帮我找出这种错误的原因吗？
\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\captionsetup{justification=centering}
\caption{\footnotesize First stage results at different levels. \\ ATC-3 aggregation represents the main specification. \label{fiststage}}
\scalebox{0.6}{ \vspace*{-0.01mm}\begin{tabular}{l*{2}{D{.}{.}{-1}}}
\toprule & \multicolumn{1}{c}{\textbf{(ATC-Firm Aggregation)}} & \multicolumn{1}{c}{\textbf{(ATC-3 Aggregation)}} \\
&\multicolumn{1}{c}{Log sales}&\multicolumn{1}{c}{Log sales}\\
\midrule
$\tilde{recalls}$ & -0.0053 & -0.0283\sym{***}\\
& (0.0033) & (0.0056) \\
$\tilde{recalls}_{t-1}$ & -0.0267\sym{**} & -0.0267\sym{***}\\
& (0.0083) & (0.0070) \\
$\frac{K_{t+1}}{P_{-1}}$ & & 0.1932\sym{**} \\
& & (0.0628) \\
\textit{average age firm}
& & 0.1576 \\
& & (0.0921) \\
\textit{aaf}$^{2}$. & & -0.0020 \\
& & (0.0013) \\
hhi & & 1.2405\sym{***}\\
& & (0.2590) \\
\textit{share generics in ATC}
& & -0.1895 \\
& & (0.3373) \\
papers & & -0.0260 \\
& & (0.0507) \\
\textit{\# firms}
& & 0.0077 \\
& & (0.0071) \\
\multicolumn{1}{l}{Year Dummies} & \multicolumn{1}{c}{Yes} & \multicolumn{1}{c}{Yes} \\ \midrule \multicolumn{1}{l}{Obs.} & \multicolumn{1}{c}{48915} & \multicolumn{1}{c}{1664} \\ \multicolumn{1}{l}{Groups} & \multicolumn{1}{c}{8634} & \multicolumn{1}{c}{208} \\
\bottomrule
\multicolumn{5}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{5}{l}{\footnotesize \sym{*} \(p<0.05\), \sym{**} \(p<0.01\), \sym{***} \(p<0.001\)}
\end{tabular}}\begin{spacing}{0.1}\vspace{0.3cm} \footnotesize {\fontsize{50}{60}\selectfont}{\fontsize{50}{60}\selectfont}{\fontsize{5}{6}\selectfont}{\Huge }{\begin{minipage}{11.6cm}\tiny Huber-White robust and clustered at ATC-3 level standard errors are in parentheses. First-stage results are shown in this Table. (1) fits an F.E. model at ATC-Firm level, i.e., ATC lines of productions within firms. This level is introduced to check the possibility of compensations between sales of products belonging to the same ATC (excluded due to the significance of the coefficient of recalls witnessing a drop after a recall) (2) fits an F.E. model at the ATC-3 level. $\tilde{recalls}$ represent recalls normalized. At the ATC level, recalls are respectively normalized for the number of products within an ATC. \end{minipage}} \\ {\fontsize{50}{60}\selectfont}{\fontsize{5}{6}\selectfont} \end{spacing}
\end{table}