Closed kevpwang closed 2 years ago
Performance plot:
First time using the negative and inverse hinge constraints, so let me know whether I've described what they're doing correctly.
This looks fantastic! Just need to remove those 2 commented-out constraints, and add the code (in the channel) to filter the 20,000 down to 5,000 total.
Thanks! Just made fixes.
@kevpwang this is good to merge, right?
This is all set.
@CoryMcCartan , thanks for pointing me to these 2020 Congressional state files. Unlike other states, the graph of minority VAP share by ordered districts for Georgia posted here doesn't seem to match your GA_cd_2020_stats.tab results. The GA_cd_2020_stats.tab stats for the enacted districts seem right (similar to https://projects.fivethirtyeight.com/redistricting-2022-maps/georgia/). Can you take another look at the minority VAP above? Maybe it's from a different enacted or proposed map? -Geoff
Redistricting requirements
In Georgia, districts must, under the 2021-22 Guidelines for the House Legislative and Congressional Reapportionment Committee:
Interpretation of requirements
We enforce a maximum population deviation of 0.5%.
Data Sources
Data for Georgia comes from the ALARM Project's 2020 Redistricting Data Files.
Pre-processing Notes
No manual pre-processing decisions were necessary.
Simulation Notes
We sample 20,000 districting plans for Georgia. To balance county and municipality splits, we create pseudocounties for use in the county constraint, which leads to fewer municipality splits than using a county constraint. Note that Cobb, Fulton, and Gwinnett Counties must be split due to their large populations, although within each of these counties, we avoid splitting any municipality. We apply a hinge Gibbs constraint of strength 20 to encourage drawing the same number of majority-Black districts as the enacted plan, focusing on districts with relatively higher proportions of Black voters. We also apply a hinge Gibbs constraint of strength 10 to discourage packing of Black voters.
Validation
Checklist
TODO
lines from the template code have been removedenforce_style()
to format my coderedist_map
andredist_plans
objects, and summary statistics) have been edited@CoryMcCartan @kuriwaki