This is the homepage of a working group, located at the Ruhr-Universitaet Bochum (Fakultaet fuer Sozialwissenschaft),  Germany, interested in

Statistical Concepts and Models for Social Research.

Currently available links are: 

Papers provides a link to a selection of working papers, and similar documents, contributed by members, or friends, of the working group. Papers are provided as compressed PostScript files, see the README file. 
Lecture Notes provides a link to notes and materials that we are using for teaching. 
TDA provides a link to the TDA (Transition Data Analysis) software developed by members of the working group.

You may also find here:

If you have any questions, or comments, send email to one of the following persons:

Ulrich.Poetter @
Goetz.Rohwer @