Re: st: "insufficient observations" with xtreg

[Natalie Trapp <natalie.trapp@zmaw.de>]

Thank you. I will wait for more data (more years) and hope that the 
problem will diminish.

On 7/2/2010 4:11 PM, Kay Walker wrote:
> If you only have 2 years, that's not enough. The time intervals have 
> to either be more frequent or you need more years to perform it this 
> way. I assume you have x1 at start, 1 year and 2 years; x2 at the same 
> intervals etc. ie. only 2 observations per x after baseline.
>
> Cheers
> -----
> Natalie Trapp wrote:
> > Dear all,
> >
> > this question has already been posed four years ago by Liu Ying on 
> > statalist, but I couldn't find an answer to it.
> >
> > I declared the dataset to be a panel dataset:
> >
> > . xtset id Year
> >     panel variable:    id (weakly    balanced)
> >     time variable:    Year, 2002    to 2004
> >     delta:    1 year
> >
> > (the dataset is not complete yet, so I only have two years so far and 
> > more than 44.000 individuals)
> >
> > When I regress the model,
> >
> > . xtreg y x1 x2 x3 x4 x5 x6
> >
> > I get the error: "insufficient observations". Why do I get this error?
> > Is this maybe due to the short time period or due to missing 
> > observations for some individuals?
> >
> > Many thanks in advance.
> > Natalie
> > _______________________________________
> >
> > Research Unit Sustainability and Global Change
> > Centre for Marine and Atmospheric Sciences
> > Bundesstraße 55
> > D-20146 Hamburg
> >
> >
> >
> >
> >
> >
> >
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