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Every decade following the Census, states and municipalities must redraw districts for Congress, state houses, city councils, and more. The goal of the 50-State Simulation Project is to enable researchers, practitioners, and the general public to use cutting-edge redistricting simulation analysis to evaluate enacted congressional districts.
This repository contains code to sample districting plans for all 50 U.S. states, according to relevant legal requirements.
The sampled plans and accompanying summary statistics may be downloaded from the dataverse for this project. These consist of four files for each analysis:
.rds
files containing redist_map
and redist_plans
objects, which
contain the actual shapefiles and district assignment matrices and may be used
for further analysis.analyses/
contains the code for each self-contained analysisR/
contains common analysis and repository management codeUnless otherwise noted, data for each state comes from the ALARM Project's
2020 Redistricting Data Files,
which use U.S. Census demographic data (in the public domain) and election data
from the Voting and Election Science Team,
which is licensed under a CC BY 4.0 license.
In these cases, shapefiles are also taken from the U.S. Census Bureau.
Exceptions to these data sources are listed in the individual documentation files
in the analyses/
folder.
Please read the contribution guidelines.