Integrated Public Use Microdata Series

该项目将把一系列公共使用样本转换为单一连贯的形式，便于使用这些数据来研究美国社会的长期社会变化。涵盖1880年、1900年、1910年、1940年、1950年、1960年、1970年、1980年和1990年的美国人口普查的大型个人水平样本目前已可用或正在准备中。事实证明，这些数据是一种宝贵的资源，因为它们使研究人员能够针对其具体的研究问题进行分析，并避免使用不同年份公布的人口普查数据所带来的问题和限制。这些人口普查文件的可获得性使人们对美国长期社会变化的性质进行了一些研究。然而，由于数据文件是在不同的时间和由不同的调查人员创建的，它们的文件不兼容，记录布局和编码方案五花八门。这些差异阻碍了将数据用于研究社会变化。综合公共使用微数据系列的准备和记录将为研究界提供宝贵的数据资源，并最终将极大地有助于我们了解自1880年以来美国社会所经历的变化。

This project will convert the series of public use samples into a single coherent form, facilitating the use of these data for the study of long-term social change in American society. Large individual-level samples of the U.S. census of population covering the census years 1880, 1900, 1910, 1940, 1950, 1960, 1970, 1980, and 1990 are currently available or in preparation. These data have proven to be a valuable resource, since they allow researchers to make analyses tailored to their specific research questions and to avoid the problems and limitations associated with using the published census data for different years. The availability of these census files has led to some research on the nature of long-term social change in the United States. However, because the data files were created at different times and by different investigators, they have incompatible documentation and a wide variety of record layouts and coding schemes. These differences inhibit the use of the data for the study of social change. The preparation and documentation of an integrated Public Use Microdata Series will provide a valuable data resource for the research community, and will eventually contribute greatly to our understanding of the changes American society has undergone since 1880.