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Re: st: tsset - repeated time values within panel
From
Nick Cox <[email protected]>
To
[email protected]
Subject
Re: st: tsset - repeated time values within panel
Date
Wed, 30 Mar 2011 11:23:51 +0100
Those can't be fixed with L. -- see
FAQ . . . . . . . . . . . . . . . . . . . . . . . Replacing missing values
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox
2/03 How can I replace missing values with previous or
following nonmissing values?
http://www.stata.com/support/faqs/data/missing.html
On Wed, Mar 30, 2011 at 11:18 AM, emanuele mazzini
<[email protected]> wrote:
> Sorry for the wrong sending. I know what you mean, but I need to
> replace missing values. I can be
> more precise with the following example:
>
> group year pairid
> 1 2002 .
> 1 2003 2
> 1 2004 2
> 2 2002 .
> 2 2003 3
> 2 2004 3
>
> and I need to replace the missing values for pairid, which are
> obviously the same for the previous years for which data are missing.
> Hope this helps,
> Thank you.
>
>
>
>>
>> 2011/3/30 Nick Cox <[email protected]>:
>>> There is a difference between filling in gaps and replacing missing
>>> values. Evidently you have gaps but no missing values.
>>>
>>> If my data run
>>>
>>> group year
>>> 1 2007
>>> 1 2008
>>> 1 2009
>>> 2 2007
>>> 2 2009
>>>
>>> I have a gap for group 2 and year 2008. That is not a missing value.
>>> You can use -tsfill- to fill in gaps but it won't add any information
>>> to your data.
>>>
>>> Conversely this is an example of a missing value
>>>
>>> group year Stata_users
>>> 2 2007 4000000
>>> 2 2008 .
>>> 2 2009 5000000
>>>
>>> Nick
>>>
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