Matching TRIM Households, Families, and Persons to March CPS Data The Urban Institute  TRIM3  Reference  Contact Us

To match a TRIM household to its corresponding Match CPS household, match the TRIM variable OldIdentifier with the CPS variable H-SEQ.

Within a matching household, TRIM families can be matched with March CPS families by matching the TRIM variable CpsIdentifier with the CPS variable FFPOS. Note that this definition of family treats related subfamilies as separate families.

Within a matching household, TRIM persons can be matched with March CPS persons by matching the TRIM variable LineNumber with the CPS variable A-LINENO, or by matching the TRIM variable CpsPersonId with the CPS variable PPPOS.

When using a TRIM file that has had citizenship information imputed to it, multiple TRIM households may match a single CPS household since the imputation process replicates some households. The TRIM variable AlienHouseholdSplit indicates whether a TRIM household was a replicate or not. See the dictionary entry for AlienHouseholdSplit for details. For an example of SAS code that merges replicate households back into single households, click here.

Note: the above procedures only apply to matching TRIM records with the March CPS. For matching to other months of CPS data, contact the TRIM staff. For matching CPS records from consecutive surveys, see Matching records from consecutive months of CPS surveys