Description

SLPERNUM reports the person-record number (PERNUM) of the sample-line person within each household. The 1940 and 1950 PUMS had an extra record for supplementary questions which were asked of 5 percent of the population in 1940 and 3.33 percent of the population in 1950. The sampling technique for the 1940 and 1950 PUMS ensured inclusion of one sample-line person in nearly every household in the sample. The IPUMS puts the sample-line information on the person record. The sample-line variables are missing (i.e., are coded N/A) for all non-sample-line persons. A code of 00 in SLPERNUM indicates that the sample-line record was left blank and that the household contains no sample-line person (a relatively rare occurrence). See "Sample Designs" for more information about sampling techniques for the 1940 and 1950 PUMS.

SLPERNUM is a 2-digit numeric variable which reports the person-record number (PERNUM) of the sample-line person within each household. The 1940 and 1950 PUMS had an extra record for supplementary questions which were asked of 5 percent of the population in 1940 and 3.33 percent of the population in 1950. The IPUMS puts the sample-line information on the person record. The sample-line variables are missing (i.e., are coded N/A) for all non-sample-line persons. See "Sample Designs" for more information about sampling techniques for the 1940 and 1950 PUMS. SLPERNUM 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).

SLPERNUM Specific Variable Codes
00 = No sample-line person in this household.

Comparability

This variable is fully comparable across years.

Universe

Availability

• 2023: --
• 2022: --
• 2021: --
• 2020: --
• 2019: --
• 2018: --
• 2017: --
• 2016: --
• 2015: --
• 2014: --
• 2013: --
• 2012: --
• 2011: --
• 2010: --
• 2009: --
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• 2005: --
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• 2003: --
• 2002: --
• 2001: --
• 2000: --
• 1990: --
• 1980: --
• 1970: --
• 1960: --
• 1950: 1%
• 1940: All samples
• 1930: --
• 1920: --
• 1910: --
• 1900: --
• 1880: --
• 1870: --
• 1860: --
• 1850: --

• 2023: --
• 2022: --
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• 2005: --
• 2000: --
• 1990: --
• 1980: --
• 1970: --
• 1930: --
• 1920: --
• 1910: --

Flags

Editing Procedure

There is no editing procedure available for this variable.