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Re: st: specify base year for interacted factor variable.


From   Daifeng He <dhe.statlist@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: specify base year for interacted factor variable.
Date   Thu, 17 May 2012 21:16:58 -0400

It works! Thanks so much, Phil!

Best,
Daifeng

On Thu, May 17, 2012 at 5:41 PM, Phil Clayton
<philclayton@internode.on.net> wrote:
> Another option is to use -fvset- to set the base level; then you don't need to type the "b1999" for any subsequent models including year:
>
> fvset base 1999 year
> xtreg i.year##c.x, i(id) fe
>
> Phil
>
> On 18/05/2012, at 6:30 AM, Brendan Halpin wrote:
>
>> On Thu, May 17 2012, Daifeng He wrote:
>>
>>> . xtreg y   ib1999.year#c.x  i.year,  i(id) fe
>>
>> Does the problem also arise with
>>
>> . xtreg y   ib1999.year#c.x  ib1999.year,  i(id) fe
>>
>> or (perhaps you have a reason for not including the first order effect
>> of x)
>>
>> . xtreg y   ib1999.year##c.x,  i(id) fe
>>
>>
>> Brendan
>> --
>> Brendan Halpin,   Department of Sociology,   University of Limerick,   Ireland
>> Tel: w +353-61-213147  f +353-61-202569  h +353-61-338562;  Room F1-009 x 3147
>> mailto:brendan.halpin@ul.ie    ULSociology on Facebook: http://on.fb.me/fjIK9t
>> http://teaching.sociology.ul.ie/bhalpin/wordpress         twitter:@ULSociology
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