I cannot solve your problem directly, but maybe -nnmatch- and -psmatch2- (from ssc) and -pscore- (from SJ 5-3) can provide some answers.
Nicola
At 02.33 31/03/2007 -0400, "Sonja Gensler" wrote:
>Dear all,
>I would like to use the method of control functions to estimate the average
>treatment on the treated effect (ATTE) of an endogenous binary variable with
>treatreg.
>
>And here is my question: How can I determine the ATTE?
>
>Am I right that the parameter of the endogenous variable is just the average
>treatment effect (ATE) and not the ATTE? Am I right that the difference
>between yctrt and ycntrt is useful to determine the bias in ATTE but is also
>not equal to the ATTE?
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