st: update seqlogit available from SSC

[Maarten buis <maartenbuis@yahoo.co.uk>]

Thanks to Kit Baum an update of the -seqlogit- package is now available
from SSC. To install this update type in Stata:
-ssc install seqlogit, replace-, or -adoupdate, update-.

The -seqlogit- package estimates a sequential logit model, which can
be used to model a process that consists of a number of discrete steps,
e.g. education is attained by first deciding whether or not to finish
primary education, than those that finish primary education can continue
to choose whether or not finish secondary education, etc. The -seqlogit-
package has two aims: 1) to facilitate a decompostion proposed by Buis
(2010a) of the effect of explanatory varialbes on the final outcome (e.g.
highest attained level of education) into effects of these variables on 
the odds of passing the constituent transtions and weights that represent 
how influential that transition is. 2) to facilitate a sensitivity 
analysis to investigate the potential influence of unobserved variables as
proposed by Buis (2010b).

In this update I added a tool, -seqsens-, which can help when performing a sensitivity analysis. In particular, it helps store, use, and keep track
of, the different models that make up the sensitivity analysis. Some examples can be found on this website <http://maartenbuis.nl/haifa>, which
contains materials for a workshop on unobserved heterogeneity in sequential
logit models.

-- Maarten


Buis, Maarten L. 2010a ``Chapter 6, Not all transitions are equal: The
relationship between inequality of educational opportunities and
inequality of educational outcomes'', In:  Buis, Maarten L. ``Inequality
of Educational Outcome and Inequality of Educational Opportunity in the
Netherlands during the 20th Century''.  PhD thesis.  
<http://www.maartenbuis.nl/dissertation/chap_6.pdf>

Buis, Maarten L. 2010b ``Chapter 7, The consequences of unobserved
heterogeneity in a sequential logit model'', In:  Buis, Maarten L.
``Inequality of Educational Outcome and Inequality of Educational
Opportunity in the Netherlands during the 20th Century''. 
http://www.maartenbuis.nl/dissertation/chap_7.pdf

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

http://www.maartenbuis.nl
--------------------------


      

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