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st: Propensity Score Weights in Oaxaca
From
Ingo Isphording <[email protected]>
To
[email protected]
Subject
st: Propensity Score Weights in Oaxaca
Date
Wed, 21 Jul 2010 08:14:33 +0200
Hi all,
i have a small problem with the oaxaca command. I try to use weights
from a probability score matching with psmatch to control for
pre-treatment heterogeneity in unobservables. Unfortunately, oaxaca
does not accept my weights. I either get :
oaxaca depvar expvars [iweights=psweight] ,
by(treatment_group) relax weight(0)
weights not allowed
r(101);
or:
oaxaca depvar expvars [iw=psweight] , by(treatment_group)
relax weight(0)
(model 1 has zero variance coefficients)
iweight=psweight invalid name
r(198);
I am not sure whether it is just a syntax problem, or if I am doing
something wrong. Any suggestions?
Cheers,
Ingo
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