​_{The U.S. Census Bureau has been researching ways to use administrative data to improve data quality and reduce respondent burden. The research described in this report used a direct substitution method to simulate the use of administrative records in the 2015 American Community Survey (ACS).  Four housing items were included in the test:  year structure built, acreage, property value, and real estate tax. The Census Bureau generated summary estimates based on the administrative data and compared these simulated estimates to the published estimates based on survey responses.  The research includes an analysis of the differences between these two sets of estimates.  In addition, the study explored the potential to reduce the number of questions on the ACS since some addresses could use data from administrative records in lieu of being asked the survey questions.  Finally, the research measured improvements in missing data rates by calculating the number of ACS households that left the questions blank on the survey but had data available from administrative records to fill in the applicable values.}

_{Data included in the report, as well as additional data, are displayed in a complementary data visualization tool.}