Hello, I was wondering whether some of non-identifier variables could be time-invariant in IPUMS USA? Checking for this condition numerically is intensive, avoiding this computation would be really useful.

As I mentioned, for IPUMS USA there are not multiple observations per person. They only have one record, so can only have one value of EDUC (and every other variable). If you are using the IPUMS CPS data, respondents are interviewed multiple times. In those cases, EDUC can be different for an individual’s different interviews.

Can you clarify your purpose for needing time-invariant variables? The samples in IPUMS USA are cross sections, so there are not multiple observations per household or individual (with the exception of the multigenerational longitudinal panel). In general, birthplace (BPL), RACE and SEX are likely to be time invariant for an individual, among other variables.

Thank you for your reply. I wanted to know whether EDUC is time-invariant. I recently read a working paper where EDUC did not have any time subscript. I thought it was a mistake and I just wanted to make sure.

Thank you, I misleadingly thought that unique identifiers created from serial, person and sample could represent representative individuals across years. I add this related link for anyone falling in the same trap. [image] Could I construct panel data using multi-year ACS data USA Hi, there, As far as I know, ACS surveyed different people in different years, meaning that it is not a panel design. However, in the ACS data I downloaded from IPUMS, it has variables like household serial number and personal serial number, which can be combined to uniquely identify individuals (I suppose). Can I use this approach to link individuals in multi-year ACS data to construct panel data? Or, simply put, is it legit or possible to contract individual-level panel data using multi-year …

Time-Invariant variables?

USA

Alex July 13, 2022, 3:39pm 5

Thank you, I misleadingly thought that unique identifiers created from serial, person and sample could represent representative individuals across years. I add this related link for anyone falling in the same trap.

Topic		Replies	Views
Could I construct panel data using multi-year ACS data USA	3	2446	June 7, 2022
Following individuals USA	2	280	January 22, 2024
How describe IPUMs Data USA	2	687	December 13, 2019
Can I identify each person with a code in order to create my panel data? I've downloaded a sample from 2000 to2013 CPS	1	1684	February 12, 2015
IPUMS CPS is a rotating panel. Can I use panel data for two consecutive years? Please read details. CPS	1	807	December 1, 2015

Time-Invariant variables?

Related topics