\begin{tabular}{rcc}
\toprule
Training sales & Gradient boosting & OLS quadratic (muni+quarter FE) \\
\midrule
10,000 & 17.6 & 18.4 \\
25,000 & 16.1 & 18.1 \\
50,000 & 15.5 & 17.9 \\
100,000 & 15.2 & 17.9 \\
200,000 & 14.8 & 17.9 \\
400,000 & 14.5 & 18.1 \\
\bottomrule
\end{tabular}