“25 Years of IPUMS Data,” the current IPUMS/MPC archive exhibit, highlights a dynamic quarter center history of data innovation at the University of Minnesota. In the late 1980s, the Social History Research Laboratory at the University of Minnesota’s History Department proposed “the creation of a single integrated microdata series composed of public use samples for every year … with the exception of the 1890 census, which was destroyed by fire.” The primary aim was to make the U.S. census microdata “as compatible over time as possible while losing little, if any, of the detail in the original datasets” (Integrated Public Use Microdata Series: A Prospectus).
The team at IPUMS-USA is excited to announce the release of the 2015 American Community Survey (ACS) microdata file. IPUMS USA now contains 16 years of yearly ACS microdata for analysis. For researchers, ACS data is the most frequently used IPUMS data.