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SERIAL80
Serial number, before large group quarters were split up, 1880 100%

Description

SERIAL80 provides the original household serial number in the 1880 100% dataset.

As a part of IPUMS data processing, group quarters units containing more than 60 people were split into 1-person households, each with their own unique value in the IPUMS SERIAL variable. For this reason, the SERIAL variable makes it impossible to identify any group of people who share a group quarters unit containing more than 60 people.

Researchers needing to analyze intact group quarters units containing more than 60 people (such as the residents of a large prison or poorhouse) should use SERIAL80 instead of SERIAL. SERIAL80 assigns a common serial number to all residents of each housing unit and group quarters, regardless of size.

SERIAL80 should be used in combination with PERNUM80, which provides the original person number in the 1880 100% dataset. PERNUM ranges from 1 to 60, whereas PERNUM80 ranges from 1 to 2990, since the largest group quarters unit in the 1880 100% dataset contains 2990 people.

Units that were split into 1-person households can be identified with the SPLIT80variable.

Codes

This variable is only available in the 1880 100% dataset. SERIAL80 is an 8-digit numeric variable that provides the original household serial number in the 1880 100% dataset. As a part of IPUMS data processing, group quarters units containing more than 60 people were split into 1-person households, each with their own unique value in the IPUMS SERIAL variable. For this reason, the SERIAL variable makes it impossible to identify any group of people who share a group quarters unit containing more than 60 people. Researchers needing to analyze intact group quarters units containing more than 60 people (such as the residents of a large prison or poorhouse) should use SERIAL80 instead of SERIAL. SERIAL80 assigns a common serial number to all residents of each housing unit and group quarters, regardless of size. SERIAL80 specific variable codes for missing, edited, or unidentified observations, observations not applicable (N/A), observations not in universe (NIU), top and bottom value coding, etc. are provided below by Census year (and data sample if specified).

User Note: SERIAL80 should be used in combination with PERNUM80, which provides the original person number in the 1880 100% dataset. PERNUM ranges from 1 to 60, whereas PERNUM80 ranges from 1 to 2990, since the largest group quarters unit in the 1880 100% dataset contains 2990 people. Units that were split into 1-person households can be identified with the SPLIT80 variable.

SERIAL80 Specific Variable Codes

Comparability

This variable is only available in the 1880 100% dataset.

Universe

  • All households and group quarters.

Availability

United States
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  • 1880: 100%
  • 1870: --
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  • 1850: --
Puerto Rico
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Flags

This variable has no flags.

Editing Procedure

There is no editing procedure available for this variable.