Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: time variables year limit


From   Marcello Pagano <pagano@hsph.harvard.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: time variables year limit
Date   Thu, 23 Aug 2007 13:40:01 -0400


> From: alan_williamson88@hotmail.com
> To: statalist@hsphsun2.harvard.edu
> Subject: FW: time variable year limit‏‏
> Date: Thu, 23 Aug 2007 16:32:16 +0000
>
>
> Sorry for any inconvenience as I have tried to sent this message for more than 2 hours, but it always failed.
>
> Please help to solve the tsset problem.
>
> Thank you.
>
> Alan
>

>> From: alan_williamson88@hotmail.com
>> To: statalist@hsphsun2.harvard.edu
>> Subject: time variable year limit‏‏
>> Date: Thu, 23 Aug 2007 16:25:41 +0000
>>
>>
>> Thank you Jenny and Nick.
>>
>> I have two sets of panel data which is the same format, only the value is different. I just finished one set of the model testing. But the other set of the data could not work at all.
>>
>> I got
>>
>> . tsset id year
>> repeated time values within panel
>> r(451);
>>
>> . isid id year
>> variables id year do not uniquely identify the observations
>> r(459);
>>
>> Actually my data was sorted by id (panel-firms) and year (time variable-1990-2005). When I describe it, the data was sorted by id year. However, no matter what I do, it is not accepted at all. Please help.
>>
>> Thank you again.
>>
>> Alan.
>>
>> I agree with Jenny than Alan's problem is unlikely
>> to arise from variable names. But it is not correct
>> that choice of variable names is absolutely free.
>> Name choice is constrained in terms of length
>> and characters allowed and the fact that certain
>> words are reserved.
>>
>> Nick
>> n.j.cox@durham.ac.uk
>>
>> Jenny Winkler
>>

>>> I don't know if this answers your question but 'repeated
>>> within th panel'
>>> means that there are more than one observation for a certain
>>> country and
>>> year.
>>>
>>> If you want to tell stata tat the data you are using are
>>> panel data you have
>>> to put tsset country year or something similar (the first
>>> variable fort he
>>> cross sections, the second fort he time parameters).
>>>
>>> I don't think, you're problem has anything to do with the name of the
>>> variable, which you can choose absolutely freely for certain.
>>

>>> From: alan_williamson88@hotmail.com
>>> To: statalist@hsphsun2.harvard.edu
>>> Subject: time variable year limit
>>> Date: Thu, 23 Aug 2007 12:06:21 +0000
>>>
>>>
>>> Hello,
>>>
>>> I try to use year, yr, y, t, time, tim, etc. as the name of a time variable (tsset). But I always got 'repeated within the panel' or 'invalid time variable'.
>>>
>>> Must the time variable have a restrict name or year limit, such as minimum 2 or 3 years? Your help is appreciated.
>>>
>>> Thank you.
>>>
>>> Alan
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index