Events

Using Algorithms to Detect Gerrymandering and Improve Legislative Redistricting: Cases from the United States and Japan

  • 11 Feb 2025

    12:30-14:00, SCR, Nuffield College

  • Political Science Seminars   Add to Calendar
Speaker: Kosuke Imai (Nuffield College Visitor)

Harvard University

This event is part of the Political Science Seminar series. Please note: This is a hybrid event.

Abstract: In representative democracies, legislative redistricting, which redraws district boundaries after Census, plays a fundamental role in ensuring equal representation.  Redistricting also influences who is elected and hence what policies are eventually enacted.  Because the stakes are high, redistricting has been subject to intense political battles. Parties often engage in gerrymandering by manipulating district boundaries to amplify the voting power of some groups while diluting that of others.  Drawing upon my own involvement in actual redistricting court cases in the United States, I will discuss how computational algorithms, combined with granular data, can be used to detect gerrymandering.  I will also use these algorithms to evaluate the partisan bias of Japanese redistricting where politicians play less prominent roles than the United States.

The Political Science Seminar Series is convened by Rachel Bernhard and Tarik Abou-Chadi. For more information on this or any of the seminars in the series, please contact politics.secretary@nuffield.ox.ac.uk