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Re: st: creating a custom monthly date


From   Francesco <cariboupad@gmx.fr>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: creating a custom monthly date
Date   Sat, 21 Apr 2012 15:58:42 +0200

Many thanks Eric for your kind suggestion,
I will try it right now!

Have a nice day,
Best

On 21 April 2012 15:46, Eric Booth <eric.a.booth@gmail.com> wrote:
> <>
>
> Sounds like it could be a job for -help bcal-.
> I'm not sure that I fully understand your decision rules for creating the custom month, but this might get you started without -bcal-:
>
> *******************!
> clear
> set obs 10000
> g date = 15000+runiform()*800 //fake dates
> format date %td
> duplicates report
>
> gen month = month(date)
>
> clonevar month_new = month
> replace month_new = month-1 if  ///
>        month(date-2)<month(date) | month(date-1)<month(date) & inrange(dow(date-2), 1, 5)
> replace month_new = month+1 if  ///
>        month(date+3)>month(date) | month(date+2)>month(date) | month(date+1)>month(date)
> g flag = month_new!=month
> l if day(date)<2 & flag //check
> *******************!
>
> - Eric
>
> __
> Eric A. Booth
> Public Policy Research Institute
> Texas A&M University
> ebooth@ppri.tamu.edu
> Office: +979.845.6754
>
>
> On Apr 21, 2012, at 7:56 AM, Francesco wrote:
>
>> Dear Statalist,
>>
>> I have a little problem about the creation a custom date in Stata 12.
>>
>> Let me specify what I would like to do : I have a panel dataset with
>> daily observations (which may contains multiple identical dates for
>> the same id)
>> I already know how to obtain the relevant month for each daily date,
>> by typing -gen month=mofd(daily_date).
>>
>> However, please do not ask me why, I absolutely need to create a
>> "custom" month variable that starts 2 days before the end of the
>> previous month (in terms of working days) and ends 3 days before the
>> start of the next month... I need a way to do that which I can
>> reproduce accross different datasets, thus obtaining the same custom
>> dates (for a merging purpose)...
>>
>> What do you think?
>> Could you help me ?
>>
>> Many thanks
>> *
>> *   For searches and help try:
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>> *   http://www.stata.com/support/statalist/faq
>> *   http://www.ats.ucla.edu/stat/stata/
>
>
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
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> *   http://www.ats.ucla.edu/stat/stata/

*
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