SOEP - German Socio-Economic Panel

Website: http://www.diw.de/en/diw_02.c.221180.en/research_data_center_soep.html

[From the web]
The German Socio-Economic Panel Study (SOEP) is a wide-ranging representative longitudinal study of private households, located at the German Institute for Economic Research, DIW Berlin. Every year, there were nearly 11,000 households, and more than 20,000 persons sampled by the fieldwork organization TNS Infratest Sozialforschung.

As a special service, the Research Data Center of the SOEP advises scholars who want to use SOEP as reference data or a control sample for their own studies.