Another procedure to deal with selection bias is the propensity score
matching. If I am right the Stata commands are:
pscore treat X, pscore(scorename)
attr Y1i treat, pscore(scorename) (Is this equation estimated on all the
sample or only for those with T=1 or T=0?)
What is the difference between the two procedures? Can I use both mills
ratio and propensity score to deal with selection problems?
Thanks
Francesca
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