Integrated Public Use Microdata Series: Accomplishment-Based Renewal

这是一个为美国人口普查的个人样本创建统一文件的项目，涵盖年份：1850年、1880年、1900年、1910年、1920年、1940年、1960年、1970年、1980年和1990年。这些微数据已被证明是一种宝贵的资源，因为它们使研究人员能够根据其具体的研究问题制作制表，并克服已公布的人口普查制表的不兼容性。此外，公众使用的微数据样本使研究人员有可能超越简单的表格分析，并应用日益复杂的多变量技术。这个项目将提高变量随时间的兼容性，并将1850年和1920年的人口普查年份纳入数据系列。来自美国人口普查的公众使用的微观数据样本在社会科学的几个领域具有很大的价值，使各种各样的研究人员能够对有关社会经济趋势、移民模式、社会变化和美国生活的其他几个方面的一般理论进行科学检验。适当的文件和可比性的变量和编码的样本将增加数据集对研究人员和教育工作者的价值。其中一些数据和代码本已经可以在互联网或万维网上获得，它们将成为国家信息基础设施的重要组成部分

This is a project to create unified documentation for individual-level samples of the United States census, covering the years: 1850, 1880, 1900, 1910, 1920, 1940, 1960, 1970, 1980, and 1990. These microdata have proven to be a valuable resource, since they allow researchers to make tabulations tailored to their specific research questions and to overcome incompatibilities in the published census tabulations. In addition, the public use microdata samples have made it possible for researchers to move beyond simple tabular analysis and apply increasingly sophisticated multivariate techniques. This project will enhance the compatibility of variables over time and incorporate the 1850 and 1920 census years into the data series. %%% The public use microdata samples from United States population censuses are of great value in several fields of social science, permitting a variety of researchers to carry out scientific tests of general theories concerning socio-economic trends, migration patterns, social change, and several other aspects of American life. Proper documentation and comparability of variables and coding across samples will increase the value of the data sets for researchers and educators. Already some of these data and codebooks are available over Internet or the World Wide Web, and they will be an important part of the national information infrastructure