Aw: st: RE: Manipulating data in the time series dimension of unbalanced panels

[565656@web.de]

Thanks, Joe. This is a longer but equally good way to code this.
 
Best, Kurt
 
 
 
 
 

Gesendet: Freitag, 23. August 2013 um 18:29 Uhr
Von: "Joe Canner" <jcanner1@jhmi.edu>
An: "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Betreff: st: RE: Manipulating data in the time series dimension of unbalanced panels
Kurt,

Here's one possibility:

. gen Dummy2=Dummy1
. bysort Country (time): replace Dummy2=1 if Dummy1==1 | Dummy2[_n-1]==1
. replace Dummy2=. if Dummy1==. // unless you want Dummy2 to continue to have a value of 1 even if Dummy1 is missing

Regards,
Joe Canner
Johns Hopkins University School of Medicine

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of 565656@web.de
Sent: Friday, August 23, 2013 12:18 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: Manipulating data in the time series dimension of unbalanced panels

Dear Statalist user,
 
 
This one is probably quite easy but I did not find a solution yet. Perhaps someone of you could help me?
 
I have an unbalanced panel data set with a binary dummy variable ("Dummy1"). Now I want Stata to generate a new dummy variable (Dummy2) which is coded 1 after the first dummy variable once took the value 1.
 
Example:

time                  Country                 Dummy1              Dummy2
2000q1                  1                              .                              .
2000q2                  1                              0                              0
2000q3                  1                              0                              0
2000q4                  1                              1                              1
2001q1                  1                              0                              1
2001q2                  1                              0                              1
2000q1                  2                              0                              0
2000q2                  2                              1                              1
2000q3                  2                              0                              1
2000q4                  2                              0                              1
2001q1                  2                              0                              1
2002q1                  2                              .                              . 
 

Thanks for your effort and best regards, Kurt Becker
 
 
 
 

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