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Re: st: Heckman Selection Rule

From   Maarten buis <>
Subject   Re: st: Heckman Selection Rule
Date   Fri, 31 Aug 2007 14:45:24 +0100 (BST)

--- Seema Bhatia <> wrote:
> I am trying to be as non subjective as possible.

A more practical attitude is to start from the following questions:

o What do I want to know?
o What information do I need for that?
o What information do I have in my dataset?
o What information do I (need to) add using assumptions/theory?

These kinds of models are inherently subjective, so trying to be as
"non-subjective as possible" is not very productive. 

-- Maarten

Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

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