IPUMS – USA
The Integrated Public Use Microdata Series (IPUMS) consists of 38 high-precision samples of the American population drawn from 15 federal censuses and from the American Community Surveys of 2000-2004. The IPUMS assigns uniform codes across all the samples and brings relevant documentation into a coherent form to facilitate analysis of social and economic change. Registration is required: users are automatically registered when they agree to all conditions for use.
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