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\begin{tabular}{lcccccc} \hline
 & (1) & (2) & (3) & (4) & (5) & (6) \\
VARIABLES & M common & M common & M common & M common & M common & M common \\ \hline
 &  &  &  &  &  &  \\
Treatment & 0.012 & 0.011 & 0.012 & 0.012 & 0.012 & 0.012 \\
 & (0.005) & (0.005) & (0.005) & (0.005) & (0.005) & (0.005) \\
 &  &  &  &  &  &  \\
Observations & 152 & 152 & 152 & 152 & 208 & 208 \\
 F-stat & 4.3 & 4.3 & 4.3 & 4.3 & 2.1 & 2.1 \\ \hline
\multicolumn{7}{c}{ Standard errors in parentheses} \\
\end{tabular}
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