Thanks to Kit Baum an update to -decomp- has been posted to the SSC
archives. To install, just type
ssc install decomp, replace
from inside Stata.
Description of decomp:
decomp computes Blinder-Oaxaca wage decompositions. It compares
the results from two regressions, using intermediate commands
(himod and lomod), and produces a table of output containing the
decompositions. These decompositions show how much of the wage
gap is due to differing endowments between the two groups, and
how much is due to discrimination (regarded as the portion of the
wage gap due to the combined effect of coefficients and slope
intercepts for the two groups).
The changes to this version are two-fold:
1 -decomp- now supports tobit regression
2 -decomp- now supports Heckman regression automatically, without the
need to specify a heck option.
The implications of 2) are that users with existing syntax may need to
remove the term "heck" from their code. More details can be found in
the help file.
For those interested in hacking ado files, the line
if e(cmd)=="heckman" | e(cmd)=="tobit"
can be easily modified to include other Stata regression commands if
you find that -decomp- fails on a particular type of regression. The
error message is usually something like "_cons not found" and this
indicates that the e(b) vector is not a "standard" one, but has
additional rows. The code which follows this line deals with these
additional rows, so by including the Stata command name (as returned
in e(cmd)) in that line, -decomp- should work successfully. Please
contact me if you try this and it doesn't work.
--
Kind regards,
Ian
=================================
Ian Watson
Senior Researcher
acirrt
University of Sydney
NSW 2006
Australia
Phone: 02 9351 5622
Fax: 02 9351 5615
Email: [email protected]
Web: www.acirrt.com
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