st: Getting continuos variable for wage equation for sample selectionwith panel

[ncdcta00@uniroma2.it]

Hello statalist,
I bulding a panel sample selection for women married.
In the  first step I bulding the probit and lambda for each year.  
After I don't understand if I change the data set and take only  
continuos variable and run a simple regression with lambda or do other  
type the estimation.
How take only the continuos variable in stata? and is it correct for  
sample selection with panel the second step doing a regression?
thanks a lot for your help








Quoting "Freely, Joshua" <JFreely@PPV.org>:


> Hello StataList,
> I am running an xtivreg, re and I am trying to measure the validity  
> of my instruments.  Does anyone know of a way for me to obtain an  
> F-statistic for my first stage equation?   I know xtivreg2 does it  
> for FE but not RE models.  Anyone have any ideas for me?
> Thank you.
>
>
> Joshua L. Freely
> Research Associate
> Public/Private Ventures
> 2000 Market Street, Ste. 600
> Philadelphia, PA 19103
> 215.557.4425 (office)
> 215.557.4469 (fax)
>
>
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