# Identifying individuals across the months in CPS

**URL:** <https://forum.ipums.org/t/identifying-individuals-across-the-months-in-cps/4078>\
**Category:** CPS\
**Created:** [April 6, 2021, 6:35pm UTC](https://forum.ipums.org/t/identifying-individuals-across-the-months-in-cps/4078 "2021-04-06T18:35:14Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Jung\_Hwan\_Kim](https://avatars.discourse-cdn.com/v4/letter/j/4af34b/32.png) [@Jung\_Hwan\_Kim](https://forum.ipums.org/u/Jung_Hwan_Kim)\
**Post date:** [April 8, 2021, 6:17pm UTC](https://forum.ipums.org/t/identifying-individuals-across-the-months-in-cps/4078/2 "2021-04-08T18:17:18Z")

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I have found the answer to my question in the previuos post:

> [@Question about longitudinal weights](https://forum.ipums.org/t/question-about-longitudinal-weights/4005/2):
>
> LNKFWMIS14WT is zero in these circumstances: Any cases that do not have MISH = 1 (see the [Universe page](https://cps.ipums.org/cps-action/variables/LNKFWMIS14WT#universe_section) for LNKFWMIS14WT). Any individual who does not appear in all of the first four months in sample. They may have a missing survey in one or more of those months, or the sample may not be available. I suspect these are why you are seeing so many zeros, but please follow up if you think that’s not the case.

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