Data Analysis for PolicyMaking in Georgia
Course overview › Module 3 · Redistricting Data & Callais v. Landry
Module 3 · 20 min · 5 pages

Redistricting Data & Callais v. Landry

~20 min total · Earn: Redistricting Analyst

Learn what redistricting datasets contain, how the Gingles framework worked, and what changed after the April 2026 Supreme Court ruling.

Pre-Callais Section 2 · Effects-based standard Show disparate impact on minority voters Gingles 3-part test Ecological inference (RPV analysis) CVAP demographics as evidence 2026 Post-Callais v. Landry Intent-based standard required Must show intentional discrimination Historical baseline comparisons Legislative record text mining Ensemble simulations for partisan vs. racial causation Section 2 VRA Analysis · The Shift That Changes What Data Analysts Must Prove
Module 3 overview diagram. Timeline showing pre-Callais (effects-based) vs post-Callais (intent-based) Section 2 analysis framework.

Pages in this module

  1. 3.1 What is redistricting data
  2. 3.2 The Gingles factors and Section 2
  3. 3.3 Callais v. Landry (2026)
  4. 3.4 Post-Callais data priorities
  5. 3.5 Module 3 checkpoint