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RE: st: Instrument Validity tests for Heckman 1979
From
"Schaffer, Mark E" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
RE: st: Instrument Validity tests for Heckman 1979
Date
Wed, 12 Mar 2014 16:23:30 +0000
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.