Estimation ofthe average treatment effect on the treated using nearest neighbor matching
attnd outcome treatment [varlist] [weight] [if exp] [in range] [ ,
pscore(scorevar) logit index comsup detail match_options
bootstrap bs_options ]
fweights, iweights, and pweights are allowed; see help weights.
where match_options are
matchvar(newvarname) matchdta(newfilename) id(varname)
In nearest neighbor matching, where not all controls are necessarily used in the
computation of the ATT, it is often useful to identify those observations which
were actually used. The option matchvar(newvarname) together with
matchdta(newfilename) allows to save a dataset containing the treatment
indicator, the estimated propensity score (with the variable name pscore or the
name specified by the user with the option pscore(scorevar)), and a dummy
indicating whether an observation was used in the computation of the ATT.
Furthermore, when a variable which identifies observations exists in the dataset,
users can specify a variable name for this ID variable using the option
id(varname) and this is saved as well. In detail, the options are described
below.
The variable i specify in this "matchvar(newvarname)" that endup to be an indicator variable.Does 1 indicate the observations matched coz am confused with the writting "a dummy
indicating whether an observation was used in the computation of the ATT" from stata help function.Will it indicate only observations used in calculation of ATT which might be less incase of common support
attnd outcome treatment [varlist] [weight] [if exp] [in range] [ ,
pscore(scorevar) logit index comsup detail match_options
bootstrap bs_options ]
fweights, iweights, and pweights are allowed; see help weights.
where match_options are
matchvar(newvarname) matchdta(newfilename) id(varname)
In nearest neighbor matching, where not all controls are necessarily used in the
computation of the ATT, it is often useful to identify those observations which
were actually used. The option matchvar(newvarname) together with
matchdta(newfilename) allows to save a dataset containing the treatment
indicator, the estimated propensity score (with the variable name pscore or the
name specified by the user with the option pscore(scorevar)), and a dummy
indicating whether an observation was used in the computation of the ATT.
Furthermore, when a variable which identifies observations exists in the dataset,
users can specify a variable name for this ID variable using the option
id(varname) and this is saved as well. In detail, the options are described
below.
The variable i specify in this "matchvar(newvarname)" that endup to be an indicator variable.Does 1 indicate the observations matched coz am confused with the writting "a dummy
indicating whether an observation was used in the computation of the ATT" from stata help function.Will it indicate only observations used in calculation of ATT which might be less incase of common support
