Census of Population and Housing 1970 - IPUMS Subset - United States

Abstract
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IPUMS-International is an effort to inventory, preserve, harmonize, and disseminate census microdata from around the world. The project has collected the world's largest archive of publicly available census samples. The data are coded and documented consistently across countries and over time to facillitate comparative research. IPUMS-International makes these data available to qualified researchers free of charge through a web dissemination system.

The IPUMS project is a collaboration of the Minnesota Population Center, National Statistical Offices, and international data archives. Major funding is provided by the U.S. National Science Foundation and the Demographic and Behavioral Sciences Branch of the National Institute of Child Health and Human Development. Additional support is provided by the University of Minnesota Office of the Vice President for Research, the Minnesota Population Center, and Sun Microsystems.

Geographic coverage
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National coverage

Analysis unit
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Households and Group Quarters

UNITS IDENTIFIED:
- Dwellings: No
- Vacant units: Yes
- Households: Yes
- Individuals: Yes
- Group quarters: Yes

UNIT DESCRIPTIONS:
- Households: Dwelling places with fewer than five persons unrelated to a household head, excluding institutions and transient quarters.
- Group quarters: Institutions, transient quarters, and dwelling places with five or more persons unrelated to a household head.

Universe
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Residents of the 50 states (not the outlying areas).

Kind of data
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Census/enumeration data [cen]

Sampling procedure
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MICRODATA SOURCE: U.S. Census Bureau

SAMPLE UNIT: Household

SAMPLE FRACTION: 1%

SAMPLE SIZE (person records): 2,029,666

Mode of data collection
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Face-to-face [f2f]

Research instrument
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One in five housing units in 1970 received a long form containing supplemental sample questions. There were two versions of the long form, with different inquiries on both housing and population items; 15 percent of households received one version, and 5 percent received the other. Six independent 1 percent public use samples were produced for 1970, three from the 15 percent questionnaire and three from the 5 percent questionnaire. IPUMS-International uses the "Form 2 Metro" sample.

Response rate
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UNDERCOUNT: No official estimates

摘要
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IPUMS-International项目致力于搜集、保存、协调和传播全球各国的普查微观数据。该项目汇聚了全球最大规模的公开可用普查样本档案。数据在各国及不同时间的一致性编码和文档记录，旨在便利比较研究。IPUMS-International通过网络传播系统，免费向合格研究人员提供这些数据。

IPUMS项目是由明尼苏达人口中心、国家统计办公室和国际数据档案馆共同合作而成。主要资金来源于美国国家科学基金会以及国家儿童健康和人类发展研究所的人口统计学和行为科学分支。此外，明尼苏达大学研究副校长办公室、明尼苏达人口中心以及Sun Microsystems公司也提供了额外支持。

地理覆盖范围
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全国覆盖

分析单元
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住户和集体宿舍

识别的单元:
- 居住单元：否
- 空置单元：是
- 住户：是
- 个人：是
- 集体宿舍：是

单元描述:
- 住户：与户主无亲属关系的居住单元，人员数量少于五人，不包括机构和临时住所。
- 集体宿舍：机构、临时住所和与户主无亲属关系的居住单元，人员数量五人或以上。

总体
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50个州的居民（不包括边远地区）。

数据类型
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普查/人口普查数据 [cen]

抽样程序
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微观数据来源：美国人口普查局
样本单元：住户
样本比例：1%
样本量（个人记录）：2,029,666

数据收集方式
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面对面 [f2f]

研究工具
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1970年，五分之一的住房单元收到了包含补充样本问题的长表。长表有两种版本，分别对住房和人口项目进行了不同的调查；15%的住户收到一种版本，5%的住户收到另一种。1970年制作了六个独立的1%公共用途样本，其中三个来自15%问卷，三个来自5%问卷。IPUMS-International使用的是“Form 2 Metro”样本。

应答率
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漏报：无官方估计