About the author of softRX freeware...

Robert L. (Bob) Obenchain, Ph.D.

Risk Benefit Statistics LLC

Biostatistics, Non-randomized Studies, Patient Differential Response,
Treatment Selection Bias and Confounding, Incremental Cost-Effectiveness

Professional Interests:

I continue doing active research and development of methods of adjustment for treatment-selection-bias in non-randomized studies ...especially unsupervised propensity scoring ==> Local Control.

I retired from Eli Lilly in August of 2007, where I was a Senior Research Advisor and a Statistics Group Leader for Health Outcomes Research in the US Medical division, Commercial Information Sciences.  Before my 17 years at Lilly, I was at Glaxo in the Research Triangle Park, NC, for almost 5 years.  Before that, I spent 17 years in the Applied Statistics and Quality Assurance Technology departments at AT&T Bell Labs and Bell Communications Research in New Jersey.

I received my PhD in Mathematical Statistics from the University of North Carolina, Chapel Hill, in 1969; my thesis advisors were N. L. Johnson and P. K. Sen. I served as an Associate Editor of the Journal of the American Statistical Association, Theory and Methods, from 1980 to 1985. And I was elected a fellow of the American Statistical Association in 1997.

I served as a Methods Partner with the Observational Medical Outcomes Partnership (OMOP) of the Foundation of the National Institutes of Health in 2009-2010. I also served as a Senior Research Fellow at the National Institute of Statistical Sciences (NISS) in Research Triangle Park, NC, 2010-2017. Meanwhile, I also served as an Adjunct Professor of Biostatistics, first at IU Medical School, Indianapolis, during 2005-2013 then at University of North Carolina, Chapel Hill, 2013-2015.


Bob, Tiffany and Lynne ...at Cannon Mountain, NH, in 1986.

Tiffany received her MBA from Harvard and got married to Spencer Crawford in 2009. They now live in the San Francisco Bay area.  I'm now much too old and fat to ski, but it certainly was much more fun than golf ever was!!!

Our wine cellar has stopped growing!!! Years ago, I started collecting 1997s and later vintages - primarily from California, Washington State and Australia. Today, my daughter still holds a few of my ancient (undrinkable?) bottles of 1981 Bordeaux. I wish Tiffany had been born in 1982!!!

I understand that people actually earn a living doing this. But it's just a hobby for me; guess I'm a true hacker! I started out by learning C at Bell Labs and authoring more than 20 freeware MS-DOS applications with CGA/VGA graphics for Statistical Process Control which I uploaded to CompuServe PCAPP, Library 13, Engr/Tech/Sci between 1988 and 1997.

Later, I developed a few Windows applications using the C API, but by then I had gradually shifted to concentrate upon developing functions and scripts for major statistical analysis packages: SAS/IML, Gauss, Stata, XLisp-Stat, JMP and, most recently, R (packages LocalControlStrategy, ICEinfer and RXshrink.)