# METAREA and MET2013 Codes

**URL:** <https://forum.ipums.org/t/metarea-and-met2013-codes/4067>\
**Category:** USA\
**Created:** [March 27, 2021, 5:09pm UTC](https://forum.ipums.org/t/metarea-and-met2013-codes/4067 "2021-03-27T17:09:20Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Matthew\_Bombyk](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Matthew\_Bombyk](https://forum.ipums.org/u/Matthew_Bombyk)\
**Post date:** [March 31, 2021, 6:10pm UTC](https://forum.ipums.org/t/metarea-and-met2013-codes/4067/2 "2021-03-31T18:10:27Z")

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There is no simple way to do this. Currently there are no harmonized metro codes connecting years before 2000 and after 2012, though IPUMS does have plans to extend MET2013 back to at least 1990. Please see [this forum post](https://forum.ipums.org/t/i-need-to-calculate-a-consistent-metro-definition-between-the-1990-census-2016-acs-any-ideas-for-a-crosswalk/2502) for some ideas on how to construct a linkage yourself.

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