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NMOTHERS
Number of mothers in household

Description

NMOTHERS is a constructed variable that uses MOMLOC and MOMLOC2 to count the number of women within each unit who are identified as residing with their children. Units with no mothers present are coded "0." MOMLOC2 is only available in samples 1970 and later. For persons in households, NMOTHERS indicates the number of identified mothers in the household; for persons in group quarters in the period before 1940, NMOTHERS indicates the number of identified mothers in any group of related individuals.

The universe for this variable from 1850 to 1930 and the 1940 100% dataset is all sample units, which relies on SAMPRULE. Additionally, the universe for this variable in the 1910-1920 Puerto Rican censuses is SAMPRULE not equal to 4.

Codes and Frequencies



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Comparability

From 1850 to 1930 and the 1940 100% dataset, all mother-child relationships can theoretically be identified, but for samples from 1940 onward, mothers cannot be identified in group quarters. Group quarters individuals in the period since 1940 are coded "0" in NMOTHERS, even though on rare occasions they may actually have resided with their children.

The comparability of this variable is also affected by variations in the information available for identifying mothers; see MOMRULE. In 2017, the family interrelationship variables for samples from 1970 to present were revised to increase comparability across IPUMS projects and include same-sex couples. Samples prior to 1970 continue to use the original version of family interrelationship variables. Users will find it useful to read a brief overview of the key differences of the New IPUMS Family Interrelationship Variables and "Family Interrelationships."

Universe

  • 1850-1920: All sample units (see SAMPRULE).
  • 1910PR-1920PR: SAMPRULE not equal to 4 (see SAMPRULE).
  • 1930: All sample units (see SAMPRULE).
  • 1940-2000: Not group quarters.
  • ACS, PRCS: All households and group quarters.

Availability

United States
  • 2017: All samples
  • 2016: All samples
  • 2015: All samples
  • 2014: All samples
  • 2013: All samples
  • 2012: All samples
  • 2011: All samples
  • 2010: ACS; ACS 3yr; ACS 5yr
  • 2009: All samples
  • 2008: All samples
  • 2007: All samples
  • 2006: All samples
  • 2005: All samples
  • 2004: All samples
  • 2003: All samples
  • 2002: All samples
  • 2001: All samples
  • 2000: All samples
  • 1990: All samples
  • 1980: All samples
  • 1970: All samples
  • 1960: All samples
  • 1950: All samples
  • 1940: All samples
  • 1930: All samples
  • 1920: All samples
  • 1910: All samples
  • 1900: All samples
  • 1880: All samples
  • 1870: All samples
  • 1860: All samples
  • 1850: All samples
Puerto Rico
  • 2017: All samples
  • 2016: All samples
  • 2015: All samples
  • 2014: All samples
  • 2013: All samples
  • 2012: All samples
  • 2011: All samples
  • 2010: PRCS; PRCS 3yr; PRCS 5yr
  • 2009: All samples
  • 2008: All samples
  • 2007: All samples
  • 2006: All samples
  • 2005: All samples
  • 2000: All samples
  • 1990: All samples
  • 1980: All samples
  • 1970: All samples
  • 1930: All samples
  • 1920: All samples
  • 1910: All samples

Flags

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Editing Procedure

There is no editing procedure available for this variable.