add individual principal city

Economic / epiextracts

EPI uniform extracts of the Current Population Survey Basic Monthly, Outgoing Rotation Group, and May surveys

https://microdata.epi.org/

GNU General Public License v3.0

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Open benzipperer opened 3 months ago

benzipperer commented 3 months ago

and possibly extend cbsa fips back further, using older geogphraphic coding

probably worth adding a geography FAQ page to document the extent and limitations of geographic variables