1 11:05:31 am Yuan Yuan wrote:
> Hi Arne,
>
> Thanks for the reply.
>
> I am using R version 2.14.0 and sampleSelection version 0.6.12.
>
> I estimate the model by the 1-step ML method. However, when I use
> the 2-step method, the standard errors are reported as NA.
&
will work on creating a minimal reproducible example; the dataset
is large and confidential, the models long-ish.
- Clara
On Friday, November 25, 2011 04:04:52 am Arne Henningsen wrote:
> On 25 November 2011 04:37, Yuan Yuan wrote:
> > Hello,
> >
> > I am working on
Hello,
I am working on reproducing someone's analysis which was done in
Stata. The analysis is estimation of a standard Heckman sample
selection model (Tobit-2), for which I am using the sampleSelection
package and the selection() function. I have a few problems with the
estimation:
1) The re
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