st: Attrition question...

[David Torres <torresd@umich.edu>]

I have a longitudinal file on which I just completed multiple  
imputation.  It has been reshaped to long format.  I need to cycle  
through each case and drop all instances for which someone was missing  
in a round and was never interviewed again up to the most recent  
survey round.  Is there a quick and easy way to do this?

For a case like this:

id     interviewed?     ...      ...

1           y
1           n
1           y
1           y
1           y
1           n
1           n
1           n
1           n

I would like to drop all information from round six on.

The purpose is to drop the fully attrited cases, then reshape wide,  
then back to long.  Then I can calculate IPTW weights.

Thanks,
Diego Torres

--
David Diego Torres, MA(Sociology)
PhD Candidate in Sociology

2044 Population Studies Center
University of Michigan Institute for Social Research
Ann Arbor MI  48106-1248
Tel 734.763.4098
Fax 734.763.1428
torresd at umich dot edu




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