Status:Closed    Asked:Sep 28, 2015 - 01:39 PM


I found "BIRTHYR" variable in USA ipumps, but could not find it in 1980 USA samples in international ipumps. How can I find it?

Do you have the same question? Follow this Question


BIRTHYR is IPUMS-USA is only available in 1% samples for 1900 and 1910. For other USA samples, BIRTHYR is a derived variable. In contrast, for IPUMS-International samples, BIRTHYR is a respondent reported variable. Therefore BIRTHYR in IPUMS-USA is not comparable with BIRTHYR in IPUMS-International.

To obtain the equivalent for IPUMS-USA 1980, subtract AGE from 1980--which is what is avialable from IPUMS-USA 1980.

Please see the IPUMS-USA BIRTHYR comparability discussion: :

"Self-reported birth year is available only for the 1 percent samples for 1900 and 1910, in which it occasionally conflicts with self-reported AGE. IPUMS retains this original detail; users should exercise caution in these situations."

Compare with the comparability discussion for IPUMS-International:

"There are no comparability issues across samples, apart from differing bottom-codes (see the codes page), the universe difference for South Africa 2007, and the use of the Hijiri calendar instead of the Gregorian one in the Iran and Morocco samples. "



Sep 29, 2015 - 02:08 AM

Report it


Why is the income wage variable incwage-capped? and how is the cap determined...
USA IPUMS 1980 ancestry variable -- mapping to country names
Did the version of database change since 2011?
Are DATANUM, SERIAL, and PERNUM the same in single-year and 5-year ACS sample...
How can I accurately calculate the median family income by state for families...
Detailed Variables Dropping From Dataset
Login   |   Register

Share |