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st: RE: Transform unbalanced data into cross-sectional data
From
Nick Cox <[email protected]>
To
"'[email protected]'" <[email protected]>
Subject
st: RE: Transform unbalanced data into cross-sectional data
Date
Thu, 29 Sep 2011 16:44:46 +0100
It is not clearly that any change is needed. You just treat your data differently. Thus
regress income age
pools data. Of course, you might want to allow in some way for persons as clusters.
Nick
[email protected]
Jingjing Niu
I have an unbalanced data and I want to transform it into
cross-sectional data, because the drop out rate is high and I am
interested in the cross-sectional comparison. This data includes 3
waves, and new observations were added each year to maintain a
reasonable sample size. Some individual were measured once out of the
3 waves, some twice and some three times. An simple example of the
data is pasted below.
person year income age sex
1 2003 1500 27 1
1 2004 1700 28 1
2 2003 2100 41 2
2 2004 2100 42 2
2 2005 2200 43 2
3 2004 3000 35 1
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