The study "GESIS Panel" is available now in an enhanced version including wave "cc" (June through August 2015). This survey is offered from GESIS - Data Archive for the Social Sciences in two different editions:
The Standard Edition (ZA5665) can be ordered with a contract: doi:10.4232/1.12332
The Extended Edition (ZA5664) is only available in our Secure Data Center in Cologne: doi:10.4232/1.12331