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st: Test for divifing sample
From
Hussain Samad <[email protected]>
To
[email protected]
Subject
st: Test for divifing sample
Date
Mon, 18 Apr 2011 10:15:38 -0700 (PDT)
Dear Statalist:
I have a sample with three groups of households. One receives treatment 1, the
second treatment 2, and the third is control. I can estimate the effects of the
treatments using a model like Y=atreat1+btreat2+X+e. Now I want to estimate
effects of treat1 and treat2 separately, for example,
1) I drop the households with treatment 2, and estimate Y=atreat1+X+e
2) I drop the households with treatment 1, and estimate Y=btreat2+X+e
Can I simply do that? Are there statistical implications? Please help me on the
tests that need to be done in order to do so.
Thanks. Hussain
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