Re: st: RE: Problem with xi and xtivreg2

[Juan Pablo Cote Baron <jp.cote63@uniandes.edu.co>]

Hi Mark,

Thanks for your response. I tried what you suggested but it didn't work. Having created the year dummies first, I typed:

xtivreg2 x w _Iyear_2004 _Iyear_2005 (y = z), fe robust

but I keep getting the same error message. I wonder what the problem could be.

Thanks again,

Juan.


>----- Mensaje original -----
>2011/6/19 Schaffer, Mark E <M.E.Schaffer@hw.ac.uk>

>Juan,

>> -----Original Message-----
>> From: owner-statalist@hsphsun2.harvard.edu
>> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of
>> Juan Pablo Cote Baron
>> Sent: 19 June 2011 00:40
>> To: statalist@hsphsun2.harvard.edu
>> Subject: st: Problem with xi and xtivreg2
>>
>> Dear statalist users,
>>
>> I have a problem when using the xi: xtivreg2... combination.
>> I need to regress "x" on "w", an instrumented variable "y"
>> and on year dummies. I typed this:
>>
>> xi: xtivreg2 x w i.year (y = z), fe robust
>>
>> but it doesn't work. Instead, I get the error message "too
>> few variables specified r(102)", but I don't know what the
>> problem could be (the syntax works when I use it with another
>> cathegorical variable different from year) .

>What happens if you first use -xi- on its own to create the year
>dummies, and then use the year dummies in the estimation without -xi-?

>--Mark

>>
>> Thanks in advance,
>>
>> Juan Pablo Cote.
>>
>>