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SPSS Community News

Jon K Peck
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