How to use propensity scores in the analysis of nonrandomized ...

"Jan 5, 2007 ... 2007Jan05. 1. How to use propensity scores in the analysis of nonrandomized 
designs. Patrick G. Arbogast. Department of Biostatistics."

http://www.mc.vanderbilt.edu/crc/workshop_files/2007-01-05.ppt