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st: Re: treatment effect


From   Manuel Chávez <mchavez@evalalianza.org.mx>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: treatment effect
Date   Thu, 18 Aug 2005 10:14:33 -0500

It seems you have to estimate first your survival function and then compare
the values that this function take for the individuals in the treatment and
control group. This should be the relevant difference. The thing is how to
choose the individuals to be compared. You can use propesnity score
matching, mahalanobis distances or kernel matching (those are the matching
techniques use more often).

Take a look to psmatch and nnmatch commands.

Good luck

Manuel

----- Original Message -----
From: "Patricia Vera Rojas" <pverarojas@yahoo.es>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, August 17, 2005 8:26 PM
Subject: st: treatment effect


> Hi,
>
> I want to determine the impact of a labour market program
> in the employment results for participants(the treatment
> occurs at some time during the unemployment spell).
> Following Fredrikson and Johansson (2004)("Dynamic
> treatment assignment-the consequences for evaluation  using
> observational data"), this effect can be estimated through
> the difference between survival functions for treated and
> not treated.
>
> After the logit/probit for getting the probability of
> participation in the program, what is the command for
> getting this difference?. Since "stslist" gives a table of
> probabilities of survival for the entire population and not
> for anyone, how can I get this difference?.
>
> Thanks,
> Patricia
>
>
>
>
>
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