Mark,
sorry,
i wrote down the reduced form of my equation,because i thougt this would be
adequate. but in the original form my equation has more regressors than
clusters.after your reply i tried to estimate the reduced form and there is
no error message any more.so the problem should be that the numbers of
regressors is bigger than the number of clusters,although i have 1900
observations.
Max
>
--- Urspr�ngliche Nachricht ---
> Von: "Max Steinhardt" <[email protected]>
> An: [email protected]
> Betreff: RE: st: RE: RE: Xtivreg2
> Datum: Mon, 3 Apr 2006 14:59:26 +0200 (MEST)
>
> - yes,in this reduced form equation are only 25 regressors.
> -when i drop weights,i receive the same error message.
> Max>
>
>
> --- Urspr�ngliche Nachricht ---
> > Von: "Schaffer, Mark E" <[email protected]>
> > An: <[email protected]>
> > Betreff: RE: st: RE: RE: Xtivreg2
> > Datum: Mon, 3 Apr 2006 13:51:48 +0100
> >
> > Max,
> >
> > That looks like it might be a bug. Am I correct to think that there are
> > only 25 regressors?
> >
> > One other question - what happens if you omit the weight command?
> >
> > --Mark
> >
> > > -----Original Message-----
> > > From: [email protected]
> > > [mailto:[email protected]] On Behalf Of
> > > [email protected]
> > > Sent: 03 April 2006 13:34
> > > To: [email protected]
> > > Subject: Re: st: RE: RE: Xtivreg2
> > >
> > > o.k.
> > >
> > > the exact command is:
> > >
> > > xtivreg2 wage bild aerfahrung d_ajahr1- d_ajahr23 [aweight=weight],fe
> > > i(region) t(ajahr) robust cluster (region)
> > >
> > > wage: average wage per region
> > > number of regions:72
> > > number of observations:1900
> > > error message:number of clusters must be greater than number
> > > of instruments
> > >
> > > Best,
> > > Max
> > >
>
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