[Gretl-users] Heckit rho
cottrell at wfu.edu
Tue Apr 7 10:21:17 EDT 2009
On Tue, 7 Apr 2009, Riccardo (Jack) Lucchetti wrote:
> On Tue, 7 Apr 2009, Starr, Brian wrote:
> > At the bottom of the Heckit output is a 'rho' metric. Does
> > anyone know what it is measuring?
> That's the estimated correlation coefficient between the
> disturbance term of the main equation and the one of the
> selection equation. AFAIK, calling it "rho" is fairly standard,
> but I may be wrong. Do you find it too cryptic?
I think maybe that should be mentioned in section 22.6 of the
User's Guide, where heckit is discussed. There we talk of a
lambda but no rho.
More information about the Gretl-users