CGA has a long term data archive on DataVerse: https://dataverse.harvard.edu/dataverse/cga
Here are a few sample datasets that can be shared via the CGA repository on IQSS Dataverse:
- Income by Zip Code Data- covers all of the U.S.
- China Air Pollution Data (Daily Averages)
- Georeferenced map of US during Civil War
- ESRI Business Analyst Census Data Variables
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