Mohammad Rahman <[email protected]>:
Can you show a set of commands using publicly available data that
reproduces this error? The help for -ivpois- (on SSC) shows
estimation examples using three datasets avail via:
use http://fmwww.bc.edu/ec-p/data/wooldridge/card, clear
ssc inst ivpois, replace
net get ivp_bwt
use ivp_bwt, clear
net get ivp_cig
use ivp_cig, clear
and -webuse- has access to many more example datasets.
-ivpois- cannot be used for Negative Binomial models.
On Dec 18, 2007 4:51 PM, Mohammad Rahman <[email protected]> wrote:
> Hi,
>
> I have not been successful in using IVPOIS command in Stata 10. I used the
> same example that is outlined in the help file. However, every time I am
> getting an error saying: "Hessian is not positive semidefinite (an error
> occurred when bootstrap executed iv_poisson)". The error code is: r(430).
>
> I would really appreciate any help regarding this.
>
> Also, could you give me any pointer how I can use it for Negative Binomial
> models.
>
> Thanks a lot in advance.
>
> Regards,
>
> Mohammad
>
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