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	The Central Archive archives primary material (data, questionnaires, code plans) and results of empirical studies in order to prepare them for secondary analyses and to make them available to the interested public. The range of the ZA encompasses all technical areas in which procedures of empirical and historical social research are used.
Information Service:	Library 'Empirical Social Research' - Enquiry
Data Service:	Search: Data Holdings Catalogue Search in Codebooks & Questionnaires - QBase: (de): ALLBUS, GDR-new Ferderal States, Politbarometer, Eurobarometer, ISSP Data Pools: ALLBUS, GDR/New Federal States, Eurobarometer, ISSP, Election Studies, Politbarometer, IAB - Employment-Statistics, Hist. Social Research (de)
Research & Development:	ZA-EUROLAB, Method Research, Hist. Social Research, Hist. Innovation Indicator (de)
Consultation:	Dataservice & Secondary Analysis, Archiving, Processing of Datasets
National & Intern. Co-operation:	CESSDA: Integrated Data Catalogue, IFDO - IFDOnet, ICPSR, ICORE
Events:	Seminars: 30th Spring Seminar 2001 - Program availabable
	GESIS calendar: Events ZA (de/en) - GESIS overview (de) - Nat. & Intern. events (de/en) - Research in transformation processes NFS / Eastern Europe (de/en)
Publications:	ZA-Information (de)
Order Service:	Data with Documentations, Charges, Usage regulations
Organization:	Overview ZA (de), Staff, Addresses Telephone - Jobs: Stud. Hilfskräfte

The Central Archive is an institute of the Cologne Association for Social Research e.V. (KGS). There is a close co-operation with the University of Cologne.