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st: update sheafcoef available

From   Maarten buis <[email protected]>
To   stata list <[email protected]>
Subject   st: update sheafcoef available
Date   Mon, 7 Sep 2009 10:33:10 +0000 (GMT)

Thanks to Kit Baum an updated version of the -sheafcoef- package
is now availabel on SSC. To instal this update type in Stata
-scc instal sheafcoef, replace-. This update fixes a bug in the
way control variables where displayed when the -eform- option 
was specified. I will present this package (together with the 
-propcnsreg- package) at the comming UK Stata Users' meeting this 
Thursday ( ). A short 
description of this package is shown below.

sheafcoef is a post-estimation command that estimates sheaf
coefficients (Heise, Sociological Methods and Research 1972). A
sheaf coefficient assumes that a block of variables influence the
dependent variable through a latent variable. This assumption is
not tested, nor is it testable; a sheaf coefficient is just a
different way of presenting the results from a model. Its main
usefulness is in comparing the relative strength of the influence
of several blocks of variables. For example, say we want to know
what determines the probability of working non-standard hours
(evenings, nights, and weekends) and we have a block of variables
representing characteristics of the job and another block of
variables representing the family situation of the respondent,
and we want to say something about the relative importance of job
characteristics versus family situation. In that case one could
estimate a logit model with both blocks of variables and
optionally some other control variables. After that one can use
sheafcoef to display the effects of two latent variables, family
background and job characteristics, which are both standardized
to have a standard deviation of 1, and can thus be more easily

-- Maarten

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


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