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Description

The IPUMS offers three samples of the 1900 census: a 1% sample, a 1% sample with oversamples, and a 5% sample.

The two 1% IPUMS samples include different combinations of data from four independently drawn component samples:

  • a 1-in-100 national sample (SAMP1900 = 1)
  • a 1-in-5 Alaskan sample (SAMP1900 = 2)
  • a 1-in-5 Hawaiian sample (SAMP1900 = 3)
  • a 1-in-5 sample of the American Indian schedules (SAMP1900 = 4)

The 1900 1% sample with oversamples consists of all records from all four samples, with appropriate weights assigned. Since the samples have different densities, users MUST apply weighting variables such as PERWT and HHWT to get accurate statistics when using this sample.

The 1900 1% sample consists of a data from the first sample and a subset of the data from from samples 2-4. To make the sample self-weighting (i.e., all records have the same weight), we selected approximately 5% of the records from each of the 1-in-20 samples. The 1% sample has significantly fewer cases than the 1% sample with oversamples, but it does not require the use of weights. All cases in the 1% sample represent approximately 100 people in the population.

More information about how each of the component samples was drawn is available in the IPUMS sampling documentation.

Codes and Frequencies



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Comparability

This variable is available only in the 1900 samples.

Universe

  • All households and group quarters.

Availability

United States
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  • 1900: 5%; 1%; 1.2% ovrsmp
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Puerto Rico
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