Hello,
I’m looking at your crosswalks from 2010 to 2020 at the block group level. I noticed you have a variety of weights (including those for population and households) in your files, but the Census crosswalks only include land are. Can you please provide more information on what Census files you used to obtain the other weights?
Thanks in advance!
As explained in the Methodology section of the Crosswalks page:
To generate all other crosswalks [including the block group crosswalks], we use block-level data and the block-to-block crosswalks to compute the proportion of each source zone’s characteristics that were located in each target zone. For example, to compute the household interpolation weights in crosswalks from 2010 block groups (BGs) to 2020 census tracts, we:
- Apply the weights in the 2010-to-2020-block crosswalk to 2010 block-level household counts to compute counts of 2010 households in all intersections between 2010 and 2020 blocks
- Sum the block-level-intersection counts for each unique combination of 2010 BG ID and 2020 tract ID to compute counts of 2010 households in each intersection between 2010 BGs and 2020 tracts
- Divide each of these “intersection counts” by the total household count for the corresponding 2010 BG to compute the expected proportion of the 2010 BG’s households that are located in each 2020 tract
The same section also provides info about how we generate the block-to-block crosswalks.