# CPS person level weights consistency with other sources **URL:** \ **Category:** CPS\ **Created:** [January 31, 2014, 2:45pm UTC](https://forum.ipums.org/t/cps-person-level-weights-consistency-with-other-sources/408 "2014-01-31T14:45:00Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![tjcmctav](https://avatars.discourse-cdn.com/v4/letter/t/ea5d25/32.png) [@tjcmctav](https://forum.ipums.org/u/tjcmctav)\ **Post date:** [January 31, 2014, 2:45pm UTC](https://forum.ipums.org/t/cps-person-level-weights-consistency-with-other-sources/408/1 "2014-01-31T14:45:00Z")
I’ve been asked to compare/validate some population estimates obtained previously from the CPS (via final and supplement weights) from dataferret with some of those with overlapping time periods I have obtained through IPUMS. I have found that the estimates are similar although slightly different. Can you provide explanations to account for the discrepancy? ---
**Author:** ![grover](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.ipums.org/grover/32/5_2.png) [@grover](https://forum.ipums.org/u/grover)\ **Post date:** [February 12, 2014, 6:56pm UTC](https://forum.ipums.org/t/cps-person-level-weights-consistency-with-other-sources/408/2 "2014-02-12T18:56:00Z")
The weight variables available through IPUMS-CPS are directly copied from the original census files so I would not expect any discrepancies based on weights. The differences you are seeing may be the result of recoding variables to enhance comparability across time in IPUMS-CPS. I would recommend comparing unweighted frequencies to establish if the variables provide the same counts between the IPUMS-CPS data and the dataferret data. If the counts are the same, but the weighted estimates are still different, please let us know. If you could provide a list of variables and/or a sample of your code, that would be very helpful in determining the source of these differences.