William R. Shadish
 

A PC computer program called the Attrition Analyzer was referenced in Footnote 2, page 5, of:

Shadish, W.R., Hu, X., Glaser, R.R., Kownacki, R.J., & Wong, T. (1998).  A method for exploring the effects of attrition in randomized experiments with dichotomous outcomes. Psychological Methods, 3, 3-22. 

As being available at ftp://irvin.psyc.memphis.edu/pub/outgoing/aa.exe. However, that address is not currently available. Though we are trying to reinstate it, we have placed the program in another location for access. You can obtain the program by clicking on ftp://141.225.10.58/aa.zip , which will download a zip file. If you unzip the file, you may then click on Setup.exe, and the program will be installed on your computer.