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SAMPRULE
Sampling rule

Description

SAMPRULE reports the sampling rule used for each case in the IPUMS samples for 1850-1930. Essentially, cases may be taken as entire dwellings, as households, as groups of related persons within some larger entity (e.g., institutional group quarters), all dwellings within a solar (see rule "7"), or as individuals, according to the following rules:

(0) Unoccupied dwelling

(1) Complete dwelling or household taken under ordinary sampling rules

1850-1920 (other than 1910-1920 Puerto Rican samples and the "Preston" component identified in SAMP1910): If a dwelling contained fewer than 31 persons, all households (1 or more) in the dwelling were sampled.
1910 "Preston" component (identified in SAMP1910): The sampling unit in the 1910 "Preston" component was the household, rather than the dwelling (see "1910 Preston Sample Design"). If a household contained 20 or fewer persons unrelated to the head, the entire household was sampled.
1910 and 1920 Puerto Rico: A household with 20 or fewer persons.
1930: The sampling unit in 1930 was the household, rather than the dwelling (see "1930 Sample Design"). If a household contined 30 or fewer people, the entire household was sampled.
(2) Complete household sampled from within a large dwelling

1850-1920 (other than the 1910 "Preston" component): If a household was located in a dwelling with more than 30 persons, the single household, and not the rest of the dwelling, was sampled. This sampling rule applied to the US and Puerto Rican samples alike.
1910 "Preston" component and 1930: Since the sampling unit in these datasets was the household, rather than the dwelling, there are no SAMPRULE values of 2.
(3) Related group sampled from within a large household or institution

1850-1930 (other than the 1910-1920 Puerto Rican samples and the 1910 "Preston" component): A group of related individuals was sampled from within a household or institution containing more than 30 persons.
1910-1920 Puerto Rican samples and the 1910 "Preston" component: A group of related individuals that included the head was sampled within a household or institution that contained more than 20 persons unrelated to the head.
(4) Individual sampled from within a large household or institution

1850-1930 (other than 1910-1920 Puerto Rican samples and the 1910 "Preston" component): Individuals were sampled within households or institutions containing more than 30 persons.
1910-1920 Puerto Rican samples and the 1910 "Preston" component: Individuals were sampled within households or institutions containing more than 20 persons unrelated to the head.
(5) Fragment

Fragments are individuals or groups of individuals who were enumerated separately from their household or group quarters. Most often this occurred when, at the end of a district, an enumerator added the names of individuals who had been missed. For these individuals, the unit's status as household versus group quarters cannot be classified. The "Preston" component of the 1910 sample contains a particularly large numbers of fragments. SAMPRULE retains these classifications, but the IPUMS variable GQ reclassifies most of these fragments as "group quarters," based on other available information on the record.
(6) Fragment reunited with household taken under ordinary sampling rules (1900-1910 US Census only)

When a household fragment fell within our sampling window, we attempted to locate the remainder of the household elsewhere on the microfilm. Individuals that did not actually fall within the sampling window were assigned a SAMPRULE of 6. These cases are assigned a PERWT value of 0, since they did not technically fall within a sampling window.
(7) All dwellings within a solar (1910-1920 Puerto Rico only)

A solar is a clustering of dwellings, specific to how dwellings
were arranged in Puerto Rico at the time. The Census Bureau provided specific
instructions as to how to enumerate this type of dwellings arrangement. In the Puerto Rican Censuses of 1910 and 1920, enumerators were to indicate if one or more dwellings were located in a solar (explained as one or more dwellings located behind a house that faced the main street being enumerated), enumerators were to assign the house number (address) to the first (or front) dwelling, and continue enumerating the rest of the dwellings in the solar by assigning the initial house number with an additional "d1," "d2," or "d3," consecutively, until all dwellings were enumerated. Rule 7 indicates that if the sample line fell on any entry line within a solar, all members of the solar were added to the sample regardless of the relationship to the head of the household or the size of the dwelling.



See "Sample Designs" for full details of sampling rules in all of the historical samples.

Codes and Frequencies



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Comparability

No information available.

Universe

  • All households and group quarters. Not available in the 1880 100% database.

Availability

United States
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  • 1930: 1%; 5%
  • 1920: 1%
  • 1910: 1%; 1.4% ovrsmp
  • 1900: 5%; 1%; 1.2% ovrsmp
  • 1880: 1%; 10%
  • 1870: All samples
  • 1860: All samples
  • 1850: 1%
Puerto Rico
  • 2017: --
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  • 1990: --
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  • 1930: All samples
  • 1920: All samples
  • 1910: All samples

Flags

This variable has no flags.

Editing Procedure

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