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Re: st: Partially balancing an unbalanced panel data set


From   A Loumiotis <[email protected]>
To   [email protected]
Subject   Re: st: Partially balancing an unbalanced panel data set
Date   Thu, 17 Jun 2010 15:36:21 +0300

Thanks a lot Scott!
For some reason I thought tsfill completely balances the data which is
not the case (it only balances the gaps).
Antonis

On Thu, Jun 17, 2010 at 3:02 PM, Scott Merryman
<[email protected]> wrote:
> xtset com qu
> tsfill
> replace assets = (l.asset + f.asset)/2 if asset == .
>
> Scott
>
>
> On Thu, Jun 17, 2010 at 6:55 AM, A Loumiotis
> <[email protected]> wrote:
>> Dear Statalist,
>>
>> I have a panel dataset that contains quarterly balance sheets of
>> corporations that belong to the Athens stock exchange (ASE) starting
>> from the first quarter of 2006 and ending at the fourth quarter of
>> 2009.  This panel dataset is unbalanced because of two reasons.
>> First, there are companies in the panel dataset that were listed in
>> the (ASE) after the first quarter of 2006 or exited the ASE before the
>> fourth quarter of 2009.  Second data for some quarters data are
>> missing for some companies although there were in the ASE. What I want
>> to do is to partially balance this dataset so that it corrects the
>> second reason that the panel set is unbalanced but not the first.
>> Last I would like to fill in the missing values with the average of
>> the previous and the next value.
>
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