a binary outcome using the method of principal stratification.

The authors have no responsibility for any consequences of use of this software.

**Frangakis, CE, **Brookmeyer, RS, Varadhan, R, Mahboobeh,
S, Vlahov, D, and Strathdee, SA. (2003). Methodology for evaluating
a partially controlled longitudinal treatment using principal stratification,
with application to a Needle Exchange Program. Research
Report NEP-06-02, Department of Biostatistics, Johns Hopkins University.
To appear in: The Journal of the American Statistical Association.

[Full
text - PDF ]

REQUIRED DOWNLOAD: pswin.zip (Windows); psunix.zip (Unix)

The user should download one of the above archived files and unzip it to get the following files:

pspack.pdf - contains detailed documentation
on using PSpack

routines.r - contains the R functions
required for data preparation and other analytic tasks

routines.f - contains Fortran source
codes

routines.so - contains a library
of executable functions (for Unix only)

routines.dll - contains a
library of executable functions (for Windows only)

sample.r - commands from a sample
session to illustrate the use of PSpack

datawide - datafile required to
run the sample session (use the command "dget" to read it into R)

The user should consult the documentation pspack.pdf
for
help with using the software. They should also read the above-referenced
paper by Frangakis et al. (2002) to understand the assumptions involved
in this framework.