Impact heterogeneity using psmatch2 option

[HABOUDANE Farid]

I am trying to match two groups of treatments using Kernel propensity score method . I used the following command in STATA to get impact heterogeneity
by sexe, sort: psmatch2....
but psmatch2 may not be combined with by.
What is the exact command to get impact heterogeneity using psmatch2 option.

[Øyvind Snilsberg]

you might want to check out the help file for psmatch2, which contains the command's syntax and examples of command usage. access the help file by typing in Stata -help psmatch2-.

[Jeff Wooldridge]

Probably you can use an “if” statement twice.