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Re: st: Balanced panel
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: Balanced panel
Date
Thu, 11 Jul 2013 15:05:05 +0100
Check out -fillin-.
[D] fillin . . . . . . . . . . . . . . . . . . . . Rectangularize dataset
(help fillin)
SJ-5-1 dm0011 . . . . . . . . . . . . . . Stata tip 17: Filling in the gaps
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox
Q1/05 SJ 5(1):135--136 (no commands)
tips for using fillin to fill in gaps in a rectangular
data structure
Nick
[email protected]
On 11 July 2013 14:47, Estrella Gomez <[email protected]> wrote:
> Dear statalisters
>
> I have a panel that contains exporters, importers and years. Since
> some countries do not trade at all, I would like to generate the zero
> observations for those cases. The command tsfill, full allows me to do
> it for a pair of countries that traded in a given year, but no in the
> rest. It generates zero observations for the years in which two
> countries did not trade, given that those countries traded in some
> year of the sample.
>
> However, I would also like to generate zero flows if two countries did
> not trade at all in any year. For instance, in the following case:
>
> t exporter importer trade
> 2006 AR CA 1
> 2008 AR CA 1
> 2006 US CA 1
> 2007 US CA 1
> 2008 US CA 1
> 2006 US AR 1
> 2007 US AR 1
> 2008 US AR 1
> 2006 CA US 1
> 2007 CA US 1
> 2008 CA US 1
> 2006 AT US 1
> 2007 AT US 1
> 2008 AT US 1
>
> tsfill, full would generate:
>
> t exporter importer trade
> 2007 AR CA .
>
> but I would also need
>
> t exporter importer trade
> 2006 AR AT .
> 2007 AR AT .
> 2008 AR AT .
>
>
> Any idea?
> Thank you very much,
> Estrella
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