Borders between counties which are not connected by highways were removed.
Simulation Notes
We sample 5,000 districting plans for Idaho, across 2 independent runs of the SMC algorithm.
We sample using the standard algorithmic county constraint.
No special techniques were needed to produce the sample.
Validation
SMC: 5,000 sampled plans of 2 districts on 931 units
`adapt_k_thresh`=0.985 • `seq_alpha`=0.5
`est_label_mult`=1 • `pop_temper`=0
Plan diversity 80% range: 0.081 to 0.689
R-hat values for summary statistics:
pop_overlap total_vap plan_dev comp_edge comp_polsby pop_hisp
1.0002363 1.0004242 0.9999541 1.0000043 0.9999779 1.0005757
pop_white pop_black pop_aian pop_asian pop_nhpi pop_other
1.0006040 1.0003794 1.0016616 1.0010224 1.0007242 0.9998282
pop_two vap_hisp vap_white vap_black vap_aian vap_asian
1.0003301 1.0004728 1.0003179 1.0003911 1.0008968 1.0010054
vap_nhpi vap_other vap_two pre_16_rep_tru pre_16_dem_cli uss_16_rep_cra
1.0010067 0.9998171 1.0007871 1.0000033 1.0012958 1.0001750
uss_16_dem_stu gov_18_rep_lit gov_18_dem_jor atg_18_rep_was atg_18_dem_bis sos_18_rep_den
1.0009342 1.0002236 1.0012880 1.0000707 1.0011649 0.9999729
sos_18_dem_hum pre_20_rep_tru pre_20_dem_bid uss_20_rep_ris uss_20_dem_jor arv_16
1.0012842 0.9999582 1.0012993 1.0001819 1.0012768 0.9999313
adv_16 arv_18 adv_18 arv_20 adv_20 county_splits
1.0010860 1.0001590 1.0012893 1.0000273 1.0012670 0.9998131
muni_splits ndv nrv ndshare e_dvs egap
1.0002937 1.0013479 1.0000786 1.0005925 1.0007021 1.0001430
Sampling diagnostics for SMC run 1 of 2 (2,500 samples)
Eff. samples (%) Acc. rate Log wgt. sd Max. unique Est. k
Split 1 2,433 (97.3%) 3.8% 0.34 1,591 (101%) 6
Resample 2,266 (90.7%) NA% 0.34 1,534 ( 97%) 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 2,432 (97.3%) 4.0% 0.34 1,593 (101%) 6
Resample 2,267 (90.7%) NA% 0.34 1,532 ( 97%) 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.
Redistricting requirements
In Idaho, districts must:
Interpretation of requirements
We enforce a maximum population deviation of 0.5%.
Data Sources
Data for Idaho comes from the ALARM Project's 2020 Redistricting Data Files.
Pre-processing Notes
Borders between counties which are not connected by highways were removed.
Simulation Notes
We sample 5,000 districting plans for Idaho, across 2 independent runs of the SMC algorithm. We sample using the standard algorithmic county constraint. 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