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The American Community Survey (ACS) and Puerto Rico Community Survey (PRCS) full implementation of Group Quarters (GQ) data collection began in 2006. The quality of the estimates from the GQ sample is directly impacted by the quality of the GQ sampling frame. One of the major building blocks of the GQ sampling frame is the Master Address File (MAF), which includes the inventory of GQs enumerated during Census 2000. Other building blocks of the GQ sampling frame include updates from state prison research, updates from military liaisons, a file of seasonal GQs that were closed on April 1, 2000, research into problems encountered by ACS Field Representatives (FRs), a file of migrant worker camp locations/addresses, and monthly files containing results of ACS field work. Although nonexistent GQ records are being removed from the sampling frame when found, one of the major concerns for the ACS is that there is no systematic mechanism in place to add GQs to the sampling frame throughout the decade. Updates will rely primarily on the 2010 Census. This evaluation answers key research questions that are directly related to the quality of the sampling frame.
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