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Re: st: impute with draws from random distribution

From   D-Ta <>
Subject   Re: st: impute with draws from random distribution
Date   Wed, 22 Jun 2011 13:46:26 +0200

So, whats a valid comparison group then in your opinion, taking into account the timing of the training? Or should I neglect that information about the timing completing when matching?



Am 22.06.2011 13:29, schrieb Maarten Buis:
On Wed, Jun 22, 2011 at 11:32 AM, D-Ta wrote:
Otherwise, the start date cannot be used as a control variable in the
matching approach. With your advice to generate dummies for missing values
(and to control for those) you cant (by definition) reach common supported
between the treated and the comparison group.

The strength of matching is that it prevents you from comparing groups
that cannot be compared. You try to circumvent that strength, which is
not a good idea.

Hope this helps,

Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
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