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IPUMS Variables (K-O)
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Household record
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Technical Variables

Geographic Variables
Family Interrelationship Variables

Group Quarter Variables
Core Demographic Variables

Economic Characteristic Variables
Ethnicity/Nativity Variables

Vacancy Status Variables
Education Variables

Dwelling Characteristic Variables
Work Variables

Appliances, Mechanical, Other Variables
Income Variables

Historical PUMS Technical Variables
Migration Variables

Constructed Household Variables
Activity Five Years Ago Variables

1970 Neighborhood Variables
Disability Variables



Veteran Status Variables



Place of Work and Travel Time Variables



Other Variables



1910 Linking Variables

IPUMS Data Quality Flags Description

IPUMS Variables Quick Reference
K
Variable Name Variable Description Rec Variable
Description		 Codes and
Frequencies		 1850 1860 1870 1880 1900 1910 1920 1940 1950 1960 1970 1980 1990
KITCHEN Kitchen or cooking facilities H Desc Codes . . . . . . . . . X X X X
L
Variable Name Variable Description Rec Variable
Description		 Codes and
Frequencies		 1850 1860 1870 1880 1900 1910 1920 1940 1950 1960 1970 1980 1990
LABFORCE Labor Force Status P Desc Codes X X X X X X X X X X X X X
LANDRENT Rent includes land used for farming H Desc Codes . . . . . . . . . X . . .
LANGUAGE Language spoken -- General P Desc
. . . . . X . . . . . X X
LANGUAGE Language spoken -- Detailed P Desc Codes . . . . . X . . . . . X X
LINE Line number H Desc
X X X X X X X . . . . . .
LINGISOL Linquistic isolation H Desc Codes . . . . . . . . . . . . X
LIT Literacy P Desc Codes X X X X X X X . . . . . .
LOOKING Looking for work P Desc Codes . . . . . . . . . . . X X
M
Variable Name Variable Description Rec Variable
Description		 Codes and
Frequencies		 1850 1860 1870 1880 1900 1910 1920 1940 1950 1960 1970 1980 1990
MAIMED Maimed P Desc Codes . . . X . . . . . . . . .
MARMONTH Month married P Desc Codes . . X . . . . . . . . . .
MARRINYR Married within the past year P Desc Codes X X X X . . . . . . . . .
MARRNO Times married P Desc Codes . . . . . X . SL SL X F1 X .
MARRQTR Quarter of first marriage P Desc Codes . . . . . . . . . X F1 X .
MARST Marital status P Desc Codes . . . X X X X X X X X X X
MBPL Mother's birthplace -- General P Desc
. . . X X X X SL SL X F2 . .
MBPL Mother's birthplace -- Detailed P Desc Codes . . . X X X X SL SL X F2 . .
MCIVDIV Civil division H Desc
X X X X . X X . . . . . .
METAREA Metropolitan area -- General H Desc
X X X X X X X X X . M S,M X
METAREA Metropolitan area -- Detailed H Desc Codes X X X X X X X X X . M S,M X
METDIST Metropolitan district H Desc
X X X X . X X . . . . . .
METRO Metropolitan central city status H Desc Codes X X X X X X X X X X S,M S,M X
MICROSEQ Microfilm sequence number H Desc
X X X X . X . . . . . . .
MIGCITY5 SMA central city 5 years ago P Desc
. . . . . . . X . . . S,M X
MIGCOGRP County group of residence 5 years ago P Desc
. . . . . . . . . . . S,M .
MIGDIST1 Distance between counties, 1 year P Desc
. . . . . . . . SL . . . .
MIGDIST5 Distance between counties, 5 years P Desc
. . . . . . . X . . . . .
MIGFARM1 Farm status 1 year ago P Desc Codes . . . . . . . . SL . . . .
MIGFARM5 Farm status 5 years ago P Desc Codes . . . . . . . X . . . . .
MIGMET1 Metropolitan status 1 year ago P Desc
. . . . . . . . SL . . . .
MIGMET5 Metropolitan status 5 years ago P Desc
. . . . . . . X . . . S,M X
MIGPLAC1 State or country of residence 1 year ago P Desc Codes . . . . . . . . SL . . . .
MIGPLAC5 State or country of residence 5 years ago P Desc Codes . . . . . . . X . . X X X
MIGPUMA PUMA of residence 5 years ago P Desc
. . . . . . . . . . . . X
MIGRATE1 Migration status, 1 year -- General P Desc Codes . . . . . . . . SL . . . .
MIGRATE1 Migration status, 1 year -- Detailed P Desc Codes . . . . . . . . SL . . . .
MIGRATE5 Migration status, 5 years -- General P Desc Codes . . . . . . . X . X F2 X X
MIGRATE5 Migration status, 5 years -- Detailed P Desc Codes . . . . . . . X . X F2 X X
MIGSAMP Migration sample weight P Desc Codes . . . . . . . . . . . X .
MIGSEA1 SEA of residence 1 year ago P Desc
. . . . . . . . SL . . . .
MIGSEA5 SEA of residence 5 years ago P Desc
. . . . . . . X . . . . .
MIGTYPE1 Metropolitan status 1 year ago P Desc Codes . . . . . . . . SL . . . .
MIGTYPE5 Metropolitan status 5 years ago P Desc Codes . . . . . . . X . X F2 S,M X
MILIT5YR Armed forces 5 years ago P Desc Codes . . . . . . . . . . X X .
MMTONGUE Mother's mother tongue -- General P Desc
. . . . . X X . . . . . .
MMTONGUE Mother's mother tongue -- Detailed P Desc Codes . . . . . X X . . . . . .
MOBLHOME Annual mobile home costs H Desc
. . . . . . . . . . . . X
MOMLKREA Reason for mother link P Desc Codes . . . . . X . . . . . . .
MOMLNKWT Weight of mother link P Desc
. . . . . X . . . . . . .
MOMLOC Mother's location in household P Desc
. . . X X X X X X X X X X
MOMNO Mother number P Desc
. . . . . X . . . . . . .
MOMRULE Rule for linking mother P Desc Codes X X X X X X X X X X X X X
MORTAMT1 First mortgage monthly payment H Desc
. . . . . . . . . . . . X
MORTAMT2 Second mortgage monthly payment H Desc
. . . . . . . . . . . . X
MORTGAG2 Second mortgage status H Desc Codes . . . . . . . . . . . X X
MORTGAGE Mortgage status H Desc Codes . . . . X X X . . . . X X
MORTOTAL Total monthly mortgage payment H Desc
. . . . . . . . . . . X .
MOUNEMP Months unemployed last year P Desc Codes . . . X X . . . . . . . .
MOVEDIN When moved into residence P Desc Codes . . . . . . . . . X F2 X X
MTONGUE Mother tongue -- General P Desc Codes . . . . . X X SL . X F2 . .
MTONGUE Mother tongue -- Detailed P Desc Codes . . . . . X X SL . X F2 . .
N
Variable Name Variable Description Rec Variable
Description		 Codes and
Frequencies		 1850 1860 1870 1880 1900 1910 1920 1940 1950 1960 1970 1980 1990
N1-2ROOM 1- and 2-room units H

. . . . . . . . . . N . .
N17HWFAM Persons 0-17 in husband-wife families H

. . . . . . . . . . N . .
NAMEFRST Name, first P Desc
X X X X . . X . . . . . .
NAMELAST Name, last P Desc
X X X X . . X . . . . . .
NATIVITY Generation: nativity recode P Desc Codes . . X X X X X SL SL X F2 . .
NBLACK Negro population H

. . . . . . . . . . N . .
NBUILT39 Units built 1939 or earlier H

. . . . . . . . . . N . .
NBUILT60 Units built 1960 or later H

. . . . . . . . . . N . .
NCHBORN Children ever born to ever-married females 35-44 H

. . . . . . . . . . N . .
NCHILD Number of own children in household P Desc Codes X X X X X X X X X X X X X
NCHLT5 Number of own children under age 5 in household P Desc Codes X X X X X X X X X X X X X
NCLF-F Female civilian labor force 16+ H

. . . . . . . . . . N . .
NCLF-M Male civilian labor force 16+ H

. . . . . . . . . . N . .
NCLF-U16 Unemployed persons 16 yrs. old and over H

. . . . . . . . . . N . .
NCOLL3-3 Persons 3-34 enrolled in college H

. . . . . . . . . . N . .
NCOLL4 Persons 25-64 with 4+ years of college H

. . . . . . . . . . N . .
NCOUPLES Number of married couples in household H Desc Codes X X X X X X X X X X X X X
NDIFCNTY Persons 5+ living in different county 5 years ago H

. . . . . . . . . . N . .
NECLFAG Labor force in agriculture H

. . . . . . . . . . N . .
NECLFBLU Employed blue collar workers in labor force H

. . . . . . . . . . N . .
NECLFOCC Employed professionals, mgrs... in labor force H

. . . . . . . . . . N . .
NEDUC0-7 Persons 25-54 with 0-7 years of schooling H

. . . . . . . . . . N . .
NEDUC12 Persons 25-54 with 12+ years of schooling H

. . . . . . . . . . N . .
NEDUCMED Median years school completed for persons 25-54 H

. . . . . . . . . . N . .
NEIGHBOR Serial number of first household in neighborhood H

. . . . . . . . . . N . .
NFAMFEMH Families with female head H

. . . . . . . . . . N . .
NFAMPOV Families with income below the poverty level H

. . . . . . . . . . N . .
NFAMS Number of families in household H Desc Codes X X X X X X X X X X X X X
NFATHERS Number of fathers in household H Desc Codes X X X X X X X X X X X X X
NFINC15 Families with income of $15,000 or more H

. . . . . . . . . . N . .
NFINC5 Families with income under $5000 H

. . . . . . . . . . N . .
NFINCMD Median family income (in thousands of dollars) H

. . . . . . . . . . N . .
NFOREIGN Persons of foreign stock H

. . . . . . . . . . N . .
NGINI GINI index of income concentration H

. . . . . . . . . . N . .
NHHCAR Households with one or more cars H

. . . . . . . . . . N . .
NMEMBERS Number of members in sample unit H Desc
. . . . X . . . . . . . .
NMOTHERS Number of mothers in household H Desc Codes X X X X X X X X X X X X X
NNOS1621 Persons 16-21 not in school nor high school grads H

. . . . . . . . . . N . .
NNOSNOW Persons 16-21 years old not in school/not employed H

. . . . . . . . . . N . .
NOCUN1+ Units with 1.01+ persons/room H

. . . . . . . . . . N . .
NOCUN1+P Units with plumbing and 1.01+ persons/room H

. . . . . . . . . . N . .
NOCUNLP Owner units lacking plumbing H

. . . . . . . . . . N . .
NOWNOC10 Owner units valued at less than $10,000 H

. . . . . . . . . . N . .
NOWNOC25 Owner units valued at $25,000+ H

. . . . . . . . . . N . .
NOWNOCUN Owner-occupied units H

. . . . . . . . . . N . .
NPOP1621 Population 16-21 years old H

. . . . . . . . . . N . .
NPOP17 Population 0-17 years old H

. . . . . . . . . . N . .
NPOP65 Population 65 and over H

. . . . . . . . . . N . .
NPOPGQ Population in group quarters H

. . . . . . . . . . N . .
NPOPHH Population in households H

. . . . . . . . . . N . .
NPOPIND Primary individuals H

. . . . . . . . . . N . .
NPOPPOV Persons with income below the poverty level H

. . . . . . . . . . N . .
NRIRAT25 Units with rent-income ratio of 25%+ H

. . . . . . . . . . N . .
NRIRAT35 Units with rent-income ratio of 35%+ H

. . . . . . . . . . N . .
NRNOC150 Renter units with rent $150+ H

. . . . . . . . . . N . .
NRNOC40 Renter units with rent under $40 H

. . . . . . . . . . N . .
NRNOC60 Renter units with rent under $60 H

. . . . . . . . . . N . .
NSAMHOUS Persons 5+ living in same house as 5 years ago H

. . . . . . . . . . N . .
NSEPDIV Separated and divorced population H

. . . . . . . . . . N . .
NSIBS Number of own siblings in household P Desc Codes X X X X X X X X X X X X X
NSPANHER Persons of Spanish heritage H

. . . . . . . . . . N . .
NTOTROOM Total rooms in all units H

. . . . . . . . . . N . .
NUMHH Number of households in dwelling H Desc
X X X X . . X . . . . . .
NUMHHTAK Number of hhs sampled from dwelling H Desc
X X X X . . X . . . . . .
NUMPERHH Number of persons in household H Desc
X X X X X X X . . . . . .
NUMPREC Number of person records following H Desc Codes X X X X X X X X X X X X X
NUNAVAIL Vacant units for rent or for sale H

. . . . . . . . . . N . .
NUNHEAT Heated units H

. . . . . . . . . . N . .
NUNITS1 Units in 1-unit structures H

. . . . . . . . . . N . .
NUNITS5+ Units in 5+-unit structures H

. . . . . . . . . . N . .
NVACUNIT Vacant units (year round) H

. . . . . . . . . . N . .
O
Variable Name Variable Description Rec Variable
Description		 Codes and
Frequencies		 1850 1860 1870 1880 1900 1910 1920 1940 1950 1960 1970 1980 1990
OCC Occupation P Desc
X X X X X X X X X X X X X
OCC0050 Occupation in 1900, 1950 detailed P Desc
. . . . X . . . . . . . .
OCC1080 Occupation in 1910, 1980 basis P Desc
. . . . . X . . . . . . .
OCC1920 Occupation, 1920 manuscript edits P Desc
. . . . . . X . . . . . .
OCC1950 Occupation, 1950 basis P Desc Codes X X X X X X X X X X X X X
OCC5YR Occupation 5 years ago P Desc
. . . . . . . . . . F1 . .
OCC5YR95 Occupation 5 years ago, 1950 basis P Desc
. . . . . . . . . . F1 . .
OCCSCORE Occupational income score P Desc
X X X X X X X X X X X X X
OWNERSHP Ownership of dwelling -- General H Desc Codes . . . . X X X X . X X X X
OWNERSHP Ownership of dwelling -- Detailed H Desc Codes . . . . X X X X . X X X X
Availability Key
All Years1940 and 1950197019801990

X=Available in all samples in this year

SL=Available only for sample-line persons

F1=Form 1 samples (5%)

S=State sample ("A" or 5% state)

S=State sample, Flat sample (5% state)

.=Not available in this year


F2=Form 2 samples (15%)

M=Metro sample ("B" or 1% county group)

M=Metro sample (1% metro)



S=State sample

UR=Urban/Rural sample ("C" or 1% urban/rural)

E=Elderly sample



M=Metro samples (county group)





N=Neighborhood samples



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