[Limdep Nlogit List] Heckit model

Marc Goergen m.goergen at sheffield.ac.uk
Sat Dec 1 06:44:19 EST 2007

Dear all

I am trying to run a Heckman selection model. The probit runs well, but when
I try to run the linear regression using the 'select' command I get "error
message 201: SELECT - selection leaves insufficient degrees of freedom".
What is the cause of this?

Best wishes,


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