The IEA Data Processing Center (DPC), located in Hamburg, Germany, was responsible for data processing, Item Response Theory scaling, and the coordination of sampling procedures.
Contact:
Heiko Sibberns
Mexikoring 37
22297 Hamburg
Germany
Tel: +49 40 6328 1001
Fax: +49 40 6328 1003
E-mail: Civic@iea-dpc.de
URL: http://www.iea-dpc.de
