IPUMS Redesign

描述（由申请人提供）：该项目将创建两个大的平行系列的历史美国人口普查微观数据。第一个是重新设计的综合公共使用微数据系列，其中包括2000年人口普查和美国社区调查。 第二个是限制使用的微观数据档案，其中包含1940年至2000年人口普查的14亿条记录。 这两个系列将使用相同的软件、方法和文档同时开发。IPUMS是1850年至1990年期间大型普查微观数据样本的兼容系列。新的限制使用档案是人口普查局协调该局所有十年一次的微观数据的举措的产物。人口普查局已决定对这些内部文件采用IPUMS设计，并将通过人口普查局研究数据中心提供这些文件。 该项目将与人口普查局合作，制定可变编码方案，纳入限制性档案中的所有细节，并将对公共数据采用相同的编码。还必须重新设计某些变量，以适应2000年人口普查和《人口普查标准》。利用联邦对历史人口普查地理的新投资，该项目将为受限制的文件创建完全兼容的地理标识符。对于公共数据，它将减少现有的地理不兼容性，提供电子边界文件用于绘图，并创建工具将聚合上下文数据附加到个人级别的记录。 公共数据和受限数据的紧密相似性将使研究人员能够使用可公开访问的数据设计分析，并限制研究数据中心的昂贵时间。公共使用的测试数据集将被开发，以模拟受限文件的独特方面，使研究人员能够测试研究设计，证明其可行性，并最大限度地减少研究成本。 为减少维护费用并确保保存，所有文件都将转换为新的档案元数据标准。版本控制软件将允许学者复制已发表研究中使用的数据摘录。使用开源软件标准将允许人口普查局和大学间政治和社会研究联盟（ICPSR）安装，传播和维护IPUMS格式的数据。

DESCRIPTION (provided by applicant): This project will create two large parallel series of historical U.S. census microdata. The first is a redesigned Integrated Public Use Microdata Series (IPUMS) incorporating Census 2000 and American Community Surveys. The second is a restricted-use microdata archive containing 1.4 billion records from the censuses of 1940 to 2000. The two series will be developed simultaneously using the same software, methodology, and documentation. The IPUMS is a compatible series of large census microdata samples spanning the period from 1850 to 1990. The new restricted-use archive is the product of a Census Bureau initiative to harmonize all of the Bureau's decennial microdata. The Bureau has decided to use the IPUMS design for these internal files and will make them accessible through the Census Bureau Research Data Centers. The project will collaborate with the Census Bureau to create variable coding schemes incorporating all detail in the restricted files, and will apply the same codes to the public data. Redesign of certain variables will also be necessary to accommodate Census 2000 and the ACS. Capitalizing on new federal investment in historical census geography, the project will create fully compatible geographic identifiers for the restricted files. For the public data, it will reduce existing geographic incompatibilities, provide electronic boundary files for mapping, and create tools to attach aggregate contextual data to individual-level records. Close similarity of the public and restricted data will enable researchers to design their analyses with publicly accessible data and limit expensive time in a Research Data Center. Public-use test data sets will be developed to mimic the unique aspects of the restricted files, allowing researchers to test research designs, demonstrate their feasibility, and minimize research costs. To reduce maintenance costs and ensure preservation, all documentation will be converted to new archival metadata standards. Version control software will allow scholars to replicate data extracts used in published research. Use of open-source software standards will allow both the Census Bureau and the Inter-university Consortium for Political and Social Research (ICPSR) to install, disseminate, and maintain IPUMS-format data.