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Month in sample, household level


MISH is a 1-digit numeric value.


MISH indicates the number of times (from 1 to 8) occupants of a housing unit have been interviewed for the CPS. Household members are interviewed for four consecutive months, excluded for eight months, and then included for four more consecutive months. On first interview, a household has a value of 1 for MISH. Households returning to the sample after an 8-month hiatus have a value of 5, and those which have completed their last interview have a value of 8. Persons with codes of 4 or 8 in MISH are said to be in "outgoing rotation groups," because they will not be interviewed during the following month. For 1962-1967, the same information is given in ROTATE, a person-level variable.

With the original CPS public use files, MISH, along with other variables, can be used to match records for persons included in the survey for two consecutive months. IPUMS-CPS is not currently designed for such longitudinal research.


This variable is completely comparable over time.


  • All households and group quarters.


Years Jan Feb ASEC Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1968 – 1975 - - X - - - - - - - - - -
1976 – 2016 X X X X X X X X X X X X X
2017 X X - X X X - - - - - - -


This variable has no flags.