Psmatch2

[Giorgio Ricciardi]

Hi,
do you know if I can use the option 'no replacement' with the command psmatch2. I mean, if I am not looking for a 1to1 matching, is there the possibility to avoid the replacement?

Thank you

[David Radwin]

Yes, you can. See below. psmatch2 is by Leuven and Sianesi and is available from SSC.

. help psmatch2

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help for psmatch2
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Mahalanobis and Propensity score Matching

        psmatch2 depvar [indepvars] [if exp] [in range] [, outcome(varlist) pscore(varname) neighbor(integer) radius
                     caliper(real) mahalanobis(varlist) ai(integer) population altvariance kernel llr kerneltype(type)
                     bwidth(real) spline nknots(integer) common trim(real) noreplacement descending odds index logit
                     ties quietly w(matrix) ate]