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st: Fwd: DiD for Random Samples Across 5 years


From   KK L <ricky.lim12345@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Fwd: DiD for Random Samples Across 5 years
Date   Mon, 22 Jul 2013 10:04:52 +0800

Dear all,

I have a question on DiD methodology, which might be pretty basic.
Please pardon my lack of experience.

I am analysing a panel data which spans across 5 years.
For each year, there are hundreds of samples.
However,
1. the year in which the samples received treatment were diffierent.
So, there were samples which only had 1 year pre-treatment data point
as well as 1 year post-treatment data point.

2. Samples from each year are not the same. Each year different
samples are randomly drawn from the population which received the
treatment.

Is it possible to still use difference in difference to analyse the
impact of the treatment for this data?

Would appreciate if anyone could advice..
Thank you very much in advanced.


Regards,
Ricky
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