Public Choice

, Volume 176, Issue 1–2, pp 17–32 | Cite as

The new preserving and continuing Keith Poole’s infrastructure for scholars, students and observers of Congress

  • Adam Boche
  • Jeffrey B. LewisEmail author
  • Aaron Rudkin
  • Luke Sonnet


For the last 40 years, Keith Poole has developed and curated a trove of basic data and measurements related to the United States Congress. He has made these resources freely available through his widely-used website since 1995. At Poole’s, scholars, students, journalists, and the broader public could download gold-standard historical and current roll-call voting data, member rosters, NOMINATE scores, and measures and visualizations of party cohesion and polarization, among many other useful things. In this article, we describe how we are preserving and continuing these vast public-goods contributions through the new Developed and housed at UCLA, the new carries on the creation of basic roll-call data infrastructure, including the assignment of Poole’s widely-used ICPSR number-like identifiers to new members, data on every roll-call vote ever taken, NOMINATE scores and other standard roll-call vote-based measures such as party-loyalty scores. In addition to serving as a platform for the continuation and dissemination of this basic data infrastructure, the new also provides powerful tools for exploring the history of roll-call voting, the US Congress, and American politics and political history through a simple search interface and interactive visualizations.


Roll call voting United States Congress Historical congressional data Members of Congress US Political Parties 



This project was made possible by support from The William and Flora Hewlett Foundation (Grant #2016-3870), the National Science Foundation (NSF-SBS-0611974), University of California Los Angeles Social Science Computing, and the University of Georgia.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Adam Boche
    • 1
  • Jeffrey B. Lewis
    • 1
    Email author
  • Aaron Rudkin
    • 1
  • Luke Sonnet
    • 1
  1. 1.Department of Political ScienceUniversity of California Los AngelesLos AngelesUSA

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