Primary researcher of this study is:
Prof. Dr. Gerhard Hammerschmid, Hertie School of Governance Berlin
Dataset: 1.0.4 (01.12.2015) doi:10.4232/1.12474
Access class: C - Data and documents are only released for academic research and teaching after the data depositor's written authorization. For this purpose the Data Archive obtains a written permission with specification of the user and the analysis intention.
More information is available at the data catalogue: study description.