Closed mzhao80 closed 1 year ago
In Utah, there are no state law requirements for congressional districts.
We enforce a maximum population deviation of 0.5%. We limit the number of county/municipality splits.
Data for Utah comes from the ALARM Project's Redistricting Data Files.
No manual pre-processing decisions were necessary.
We sample 5,000 districting plans for Utah across two independent runs of the SMC algorithm. No special techniques were needed to produce the sample.
SMC: 5,000 sampled plans of 4 districts on 2,299 units `adapt_k_thresh`=0.985 • `seq_alpha`=0.5 `est_label_mult`=1 • `pop_temper`=0 ℹ Preparing AR shapefile Plan diversity 80% range: 0.54 to 0.86 ℹ Preparing AR shapefile R-hat values for summary statistics: pop_overlap total_vap plan_dev comp_edge comp_polsby pop_white pop_black 1.0011028 1.0013501 1.0032429 1.0007001 1.0009548 1.0007389 1.0012223 pop_hisp pop_aian pop_asian pop_nhpi pop_other pop_two vap_white 1.0023677 1.0011348 1.0015591 1.0008147 1.0025380 1.0020332 1.0001014 vap_black vap_hisp vap_aian vap_asian vap_nhpi vap_other vap_two 1.0034864 1.0023662 1.0011476 1.0013099 1.0014830 1.0030006 1.0021348 pre_16_rep_tru pre_16_dem_cli pre_20_rep_tru pre_20_dem_bid uss_16_rep_lee uss_16_dem_sno uss_18_rep_rom 1.0024333 1.0002818 1.0028094 1.0019078 1.0005141 1.0009794 1.0007408 uss_18_dem_wil gov_16_rep_her gov_16_dem_wei gov_20_rep_cox gov_20_dem_pet atg_16_rep_rey atg_16_dem_har 1.0008207 1.0007144 1.0013581 1.0023349 1.0009473 1.0003990 1.0004774 atg_20_rep_rey atg_20_dem_sko adv_16 adv_18 adv_20 arv_16 arv_18 1.0025387 1.0019075 1.0006316 1.0008207 1.0021107 1.0020189 1.0007408 arv_20 county_splits muni_splits ndv nrv ndshare e_dvs 1.0019817 1.0000444 1.0005939 1.0010505 1.0019898 1.0001951 1.0002571 pr_dem e_dem pbias egap 0.9998962 1.0003556 1.0008593 1.0002706 Sampling diagnostics for SMC run 1 of 2 (2,500 samples) Eff. samples (%) Acc. rate Log wgt. sd Max. unique Est. k Split 1 2,306 (92.2%) 10.3% 0.56 1,593 (101%) 7 Split 2 2,333 (93.3%) 15.8% 0.45 1,536 ( 97%) 4 Split 3 2,313 (92.5%) 6.6% 0.51 1,389 ( 88%) 3 Resample 1,653 (66.1%) NA% 0.51 1,956 (124%) NA Sampling diagnostics for SMC run 2 of 2 (2,500 samples) Eff. samples (%) Acc. rate Log wgt. sd Max. unique Est. k Split 1 2,308 (92.3%) 10.0% 0.56 1,580 (100%) 7 Split 2 2,341 (93.7%) 15.6% 0.44 1,531 ( 97%) 4 Split 3 2,327 (93.1%) 5.1% 0.50 1,381 ( 87%) 4 Resample 1,826 (73.0%) NA% 0.50 1,948 (123%) NA • Watch out for low effective samples, very low acceptance rates (less than 1%), large std. devs. of the log weights (more than 3 or so), and low numbers of unique plans. R-hat values for summary statistics should be between 1 and 1.05.
TODO
enforce_style()
redist_map
redist_plans
@CoryMcCartan
Looks great!
Redistricting requirements
In Utah, there are no state law requirements for congressional districts.
Interpretation of requirements
We enforce a maximum population deviation of 0.5%. We limit the number of county/municipality splits.
Data Sources
Data for Utah comes from the ALARM Project's Redistricting Data Files.
Pre-processing Notes
No manual pre-processing decisions were necessary.
Simulation Notes
We sample 5,000 districting plans for Utah across two independent runs of the SMC algorithm. No special techniques were needed to produce the sample.
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