Re: st: -heckman- and the identifying variable(s)

[Louis Boakye-Yiadom <L.Boakye-Yiadom@bath.ac.uk>]

Thanks. I was hoping there is an equivalent of the Sargan test.

Louis

Quoting Maarten buis <maartenbuis@yahoo.co.uk>:

> --- Louis Boakye-Yiadom <L.Boakye-Yiadom@bath.ac.uk> wrote:
> > When using the -heckman- command, is there a way of checking the
> > validity of the identifying variable(s)?
> No, that is the big problem with every type of "causal" model, in the
> end they rely on assumptions you just have to believe. Descriptive
> models are in that sense much more scientific.
>
> -- Maarten
>
>
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
>
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