\begin{tabular}{l*{4}{c}} 
\\[-1.8ex]\hline \hline \\[-1.8ex]
                    &\multicolumn{2}{c}{High rice/sugar}        &\multicolumn{2}{c}{Low rice/sugar}         \\\cmidrule(lr){2-3}\cmidrule(lr){4-5}
                    &\multicolumn{1}{c}{Fires}&\multicolumn{1}{c}{PM 2.5}&\multicolumn{1}{c}{Fires}&\multicolumn{1}{c}{PM 2.5}\\
\midrule
Road built          &       3.191\sym{**} &       1.045\sym{***}&       0.036         &      -0.059         \\
                    &     (1.291)         &     (0.308)         &     (0.397)         &     (0.272)         \\
\midrule
Observations        &       92772         &       92772         &       41016         &       41016         \\
Control group mean  &        3.30         &       38.86         &        1.56         &       51.08         \\
\hline \hline \\[-1.8ex] 
\multicolumn{5}{p{\linewidth}}{\small 
\noindent \textit{Note}: All models 
include baseline controls, 
district-threshold and year FE. 
Std.\ errors clustered at village 
level. 
* p$<$0.10, ** p$<$0.05, 
*** p$<$0.01.} 
\end{tabular}
