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st: rectangulizing data


From   Dmitriy Krichevskiy <[email protected]>
To   statalist <[email protected]>
Subject   st: rectangulizing data
Date   Thu, 26 May 2011 11:19:11 -0400

Dear Listers,
I am trying to figure out the simplest way to covert a large panel
dataset from monthly to annual income. The income is only reported
monthly and I would want to clean the data of anyone missing a month
in a particular year. I would like to drop observations for that
person-year only and keep that person if they are fully present in
some other year. Here is an equivalent data structure. As always, that
a lot for your help.
Dmitriy

ID     Month   Income
1       1          1000
1       2           500
1       3          1000
1       13         0
1       14         0
1       15         0
1       16         0
1       17         600
1       18        1000
1       19        1000
1       20        1000
1       21        1000
1       22        1000
1       23        660
1       24        800
1       25        1200
2        1         2400
2        2         2400
2        5         2600
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