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For many years I have been interested in
statistical selection problems. This has produced the FUZZY extension
command for case-control matching (also PSM), the SPSSINC TOBIT REGR
command for Tobit regression models, and the STATS HECKMAN REGR command
for Heckman regression models. Now I have uploaded the STATS RDD
module for analysis of regression discontinuity designs, which have become
popular in recent years. STATS RDD estimates the effects of a treatment
on an output in a nonexperimental context. The treatment is applied
based on whether an observed assignment variable (also known as a running
variable) exceeds a known threshold. There are many published examples
in the areas of education, labor market analysis, political science, health,
crime, environment, and others.
This extension requires the R Essentials.
It can be downloaded from the SPSS Community site (www.ibm.com/developerworks/spssdevcentral)
in the Extension Commands collection or, for Statistics V22 users, it can
be downloaded and installed from the Utilities menu.
Regards,
Jon Peck (no "h") aka Kim
Senior Software Engineer, IBM
[hidden email]
phone: 720-342-5621
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