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AW: st: AW: Logical condition


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   AW: st: AW: Logical condition
Date   Thu, 15 Oct 2009 16:25:05 +0200

<> 

-xtset- and -tsset- should make no difference whatsoever. Just tried in
Stata 10 and 11...



HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Dmitriy
Krichevskiy
Gesendet: Donnerstag, 15. Oktober 2009 16:22
An: statalist@hsphsun2.harvard.edu
Betreff: Re: st: AW: Logical condition

Thanks for your help Martin.
Unfortunately, I get 'time-series operators not allowed' even though
the dataset has been declared panel via xtset (I also tried tsset to
no avail). Thanks again.


2009/10/14, Martin Weiss <martin.weiss1@gmx.de>:
>
> <>
>
>
>
> *************
> clear*
>
> input byte( id time b1 i1)
> 1   1     1   3
> 1   2     1   4
> 1   3     0   2
> 2   1     0   5
> 2   2     1   6
> 2   3     0   4
> 3   1     0   2
> 3   2     1   3
> 3   3     1   1
> end
>
> compress
> list, noobs sepby(id) // in 1/20
>
> bys id (time):  /*
> */ gen byte select= b1[1]==0 & b1[2]==1
>
> list if select, sepby(id)
> *************
>
>
>
> HTH
> Martin
>
> -----Ursprüngliche Nachricht-----
> Von: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Dmitriy
> Krichevskiy
> Gesendet: Mittwoch, 14. Oktober 2009 22:10
> An: statalist
> Betreff: st: Logical condition
>
> Dear Listers,
>
> I have a large panel dataset for which I was hoping to analyze a
> particular subset of agents. More specifically:
>
> id time b1 i1
> 1   1     1   3
> 1   2     1   4
> 1   3     0   2
> 2   1     0   5
> 2   2     1   6
> 2   3     0   4
> 3   1     0   2
> 3   2     1   3
> 3   3     1   1
> I want to select only those agents from above example who have
> switched their b1 status from 0 to 1 in the first two periods (agents
> 2 and 3 above). I want to see what happened to their b1 status since
> then, more specifically I want to see how future change in status of
> b1 (back to 0) has reflected on other variables (agent 2 here changes
> back to 0, and he now has a value of 4 in i1 variable whereas he
> started with i1=5 before his b1 status has changed). Unfortunately
> every condition I try to set up drops all observations since b1=0 and
> b1=1 are mutually exclusive even though I am looking at different time
> periods.
>
> I hope the above makes sense; and, as always, thanks for your help.
> Dmitriy
> *
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>
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>


-- 
Dmitriy Krichevskiy a. b. c. d. e. f. g. h. i. j. k. l. m. n. o. p. q.
r. s. t. u. v. w. x. y. z.

*
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