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Data Documentation Initiative (DDI)

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The Data Documentation Initiative (DDI) is an emerging standard for social science metadata that is being developed by an international group called the DDI Alliance. Version 3.0 of the DDI documents the life cycle of research data from the start of a research project through data dissemination.

Our Mission

ICPSR provides leadership and training in data access, curation, and methods of analysis for a diverse and expanding social science research community.