Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: st: Instrument Validity tests for Heckman 1979
From
"Kyrizi, Andri" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
RE: st: Instrument Validity tests for Heckman 1979
Date
Wed, 12 Mar 2014 16:58:05 +0000
Dear Professor Schaffer,
Thank you for the information.
I tried it but I couldn't get the first heckman regression.
I kept getting
Iteration 61: log likelihood = -2057.582
with no estimations.
Would it be because I use BHPS and has many observations?
All the best,
Andri
________________________________________
From: [email protected] [[email protected]] on behalf of Schaffer, Mark E [[email protected]]
Sent: 12 March 2014 16:23
To: [email protected]
Subject: RE: st: Instrument Validity tests for Heckman 1979
Andri,
> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of Kyrizi, Andri
> Sent: 12 March 2014 16:05
> To: [email protected]
> Subject: RE: st: Instrument Validity tests for Heckman 1979
>
> Professor Schaffer,
>
> I checked it but I wasn't sure if the selection bias is controlled for if you do
> not specify the group.