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st: sample size reduced significantly
From
"Yu Chen, PhD" <[email protected]>
To
[email protected]
Subject
st: sample size reduced significantly
Date
Thu, 11 Apr 2013 15:16:50 -0500
Dear Statalist,
I have several variables with each of them having at least 6000
observations (non-missing values). However, when I put them into OLS
regression, the number of observations reduced to only about 1000. I
cannot figure out what causes the problem. Could you please help me
find out the causes? What code can I use to analyze the problem?
Thank you in advance.
Yu Chen
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