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st: create a comparison group
From
Vic Z <[email protected]>
To
[email protected]
Subject
st: create a comparison group
Date
Tue, 1 Mar 2011 12:58:24 -0800 (PST)
Dear Statalister:
I have a problem with stata about how to create a comparison group for my study.
Right now I have a sample with 230 firms. I simply need to create a comparison
group with 230 other firms, which should be in the same industry, with similar
size and similar listing age to my orginal 230 firms. After that I will group
two sample together and run some regression. My problem is how I can tell stata
to pull out those 230 firms from compustat to have a one-one matching with my
orginal data sample so that I will have 230 pair firms. In each pair, the two
firms will be almost identical.
Thank you in advance.
Jian
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