\begin{knitrout}
\definecolor{shadecolor}{rgb}{0.969, 0.969, 0.969}\color{fgcolor}\begin{kframe}
\begin{alltt}
\hlstd{fit.match2}  \hlkwb{<-} \hlkwd{Match}\hlstd{(}\hlkwc{Y}\hlstd{=Y,} \hlkwc{Tr}\hlstd{=Z,} \hlkwc{X}\hlstd{=ps.true,} \hlkwc{M}\hlstd{=}\hlnum{5}\hlstd{,} \hlkwc{estimand}\hlstd{=}\hlstr{'ATE'}\hlstd{)}
\hlkwd{summary}\hlstd{(fit.match2)}
\end{alltt}
\begin{verbatim}
+ 
+ Estimate...  -1.9258 
+ AI SE......  0.042978 
+ T-stat.....  -44.809 
+ p.val......  < 0.000000000000000222 
+ 
+ Original number of observations..............  1000 
+ Original number of treated obs...............  637 
+ Matched number of observations...............  1000 
+ Matched number of observations  (unweighted).  5091
\end{verbatim}
\begin{alltt}
\hlstd{fit.match3}  \hlkwb{<-} \hlkwd{Match}\hlstd{(}\hlkwc{Y}\hlstd{=Y,} \hlkwc{Tr}\hlstd{=Z,} \hlkwc{X}\hlstd{=ps.true,} \hlkwc{M}\hlstd{=}\hlnum{10}\hlstd{,} \hlkwc{estimand}\hlstd{=}\hlstr{'ATE'}\hlstd{)}
\hlkwd{summary}\hlstd{(fit.match3)}
\end{alltt}
\begin{verbatim}
+ 
+ Estimate...  -1.9216 
+ AI SE......  0.042942 
+ T-stat.....  -44.749 
+ p.val......  < 0.000000000000000222 
+ 
+ Original number of observations..............  1000 
+ Original number of treated obs...............  637 
+ Matched number of observations...............  1000 
+ Matched number of observations  (unweighted).  10047
\end{verbatim}
\end{kframe}
\end{knitrout}