2020 Census: Innovations Helped with Implementation, but Bureau Can Do More to Realize Future Benefits, Report to Congressional Addressees [open pdf - 2MB]
From the Highlights: "For the 2020 Census, the U.S. Census Bureau (Bureau) implemented a series of planned innovations to rein in cost increases that have characterized recent decennial censuses and enhance data quality. For example, the Bureau reengineered the way that it compiled its address list to reduce time spent physically going door-to-door. The Bureau also developed automated tools designed to manage follow-up with nonresponding households more efficiently. Understanding how these innovations performed can help to gauge the cost and quality of the 2020 Census while informing decisions about future censuses. This report, the second in a series of retrospective reviews of the 2020 Census, examines the extent to which the Bureau's innovations to the 2020 Census helped the Bureau achieve its cost and quality goals."
Government Accountability Office: http://www.gao.gov/