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Re: st: propensity score problem

From (Brendan Halpin)
Subject   Re: st: propensity score problem
Date   Fri, 16 Mar 2012 13:12:30 +0000

On Fri, Mar 16 2012, Nick Cox wrote:
> Estimation of the propensity score
> outcome does not vary, remember:
>                                    0 = negative outcome,
>          All Other nonmissing values = positive outcome
> r (2000);

The unnamed propensity score program is probably failing to fit a probit
or logit on the propensity to be treated, where the dependent variable
is the treatment. This variable must be 0/non-zero; the error is the
usual one seen when logit or probit is fed a dependent which doesn't
have zero values.

Generate a treatement variable that is 1 if treated and zero otherwise.

Brendan Halpin,   Department of Sociology,   University of Limerick,   Ireland
Tel: w +353-61-213147  f +353-61-202569  h +353-61-338562;  Room F1-009 x 3147    ULSociology on Facebook:         twitter:@ULSociology

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