Central Archive for Empirical Social Research
Content 
The Central Archive contains a high quantity of selected, rich, updated and pertinent databases, covering several social sciences issues. In particular, Eastern Europe and German speaking countries are covered by surveys and statistical data.
Selection 
The Central Archive is an institution affiliated to Gesis, an umbrella organisation that brings together 78 independent research institutes. It cooperates with the University of Cologne (Köln)
Format
Data, questionnaires, codebooks and results of empirical studies are available. Research papers, working papers and publications are also retrievable
Information density
One of the richest European statistical databases. Many relevant databases with abstracts on social science literature are managed and accessible through ZA
Content Pertinence to Political Science
Among the prominent research areas: history, population surveys, social change, welfare measurement, various topics concerning Eastern Europe
Updating Rate
Updated mostly every week, at least in certain sections and pages