Data Download

NOMINATE and Related Data

1. DW-NOMINATE

   Rank Orderings all Houses and Senates -- 1^st to 111^th Congresses
   Common Space DW-NOMINATE Scores 1^st to 111^th Congresses
   DW-NOMINATE Scores 1^st to 111^th Congresses
   DW-NOMINATE Probabilities for Legislator Choices: 1^st to 111^th Congresses
   DW-NOMINATE Program With Examples
   Cutting Line Angle Files for the House and Senate 1^st to 111^th Congresses
   One-Congress-at-a-Time DW-NOMINATE (Nokken-Poole) data for the House and Senate 1^st to 111^th (2009) Congresses
   Political Polarization Measures: 1879 - 2010
   Party Unity Scores by Democrat and Republican Members: 1857 - 2010
   Pary Unity Scores by Congress: 1879 - 2010
   Percent Voting on the Winning Side by Member -- Houses/Senates 1 - 111
   Party and Chamber Medians, 1 - 111 Congresses (DW-NOMINATE Scores)
   DW-NOMINATE Output by Rohde Codes, Houses 83 - 108
   Chamber Means and Winning Policy Means for 1^st Dimension, 1 - 111 Congresses (DW-NOMINATE Scores)
   Republican and Democratic Party Splits on all roll calls cast in Congresses 35 - 111
   DW-NOMINATE Roll Call Coordinates and Issue Codes for Houses 1 to 106
   DW-NOMINATE Roll Call Coordinates and Issue Codes for Senates 1 to 106
   DW-NOMINATE Scores for Congressional Leaders: 1789 - 2000
   House and Senate Images of DW-NOMINATE Scores 70^th to 107^th Congresses
   The 106^th Congress Page shows statistics on the scalings and compares the results for the 106^th Congress with the 105^th and 104^th Congresses
   The 105^th Congress Page shows statistics on the scalings and compares the results for the 105^th Congress with the 104^th Congress
   106^th House: Two Dimensional Images For each Roll Call By Issue Code
   

2. W-NOMINATE

   W-NOMINATE in R Program with Examples
   W-NOMINATE Scores With Bootstrapped Standard Errors
   W-NOMINATE Program (Legacy FORTRAN)
   W-NOMINATE Parametric Bootstrap Program
   W-NOMINATE scores by year for 1939 - 1998
   
   
   

3. Optimal Classification (OC)

   Optimal Classification in R Program with Examples
   Optimal Classification Scores: Houses/Senates 1 - 111 in a Common Space
   Optimal Classification (OC) Program
   
   
   

4. Common Space Scores

   Common Space Scores 75^th to 111^th Congresses
   
   Format of the Common Space Scores
   
   House and Senate Images of Common Space Scores 75^th to 107^th Congresses
   
   
   

5. D-NOMINATE (1986-89)

   The original D-NOMINATE Legislator scores for Congresses 1 to 99
   The original D-NOMINATE Roll Call Coordinates and Issue Codes for Houses 1 to 99
   The original D-NOMINATE Roll Call Coordinates and Issue Codes for Senates 1 to 99
   

Software

R Package for Aldrich-McKelvey and Basic Space Scaling
R Package for Optimal Classification
R Package for W-NOMINATE (includes the parametric bootstrap option)
VOTEVIEW for WINDOWS
W-NOMINATE Program
W-NOMINATE Parametric Bootstrap Program
Optimal Classification (OC) Program
Quadratic-Normal (QN) Program
Richard McKelvey's original N-Chotomous Multivariate Probit Program
Aldrich-McKelvey's Scaling Program

Miscellaneous Information From the Roll Call Project Database

Percent Voting on the Winning Side by Member -- Houses/Senates 1 - 111
Corrected ICPSR Member ID Numbers Congresses 1 - 112
Republican and Democratic Party Splits on all roll calls cast in Congresses 35 - 111
Pary Unity Scores by Party: 1789 - 2010
Party Unity Scores by Member: 1789 - 2010
Political Polarization Measures: 1879 - 2010
Party and Chamber Medians, 1 - 110 Congresses (DW-NOMINATE Scores)
Chamber Means and Winning Policy Means for 1^st Dimension, 1 - 110 Congresses (DW-NOMINATE Scores)
DW-NOMINATE Scores for Congressional Leaders: 1789 - 2000

Roll Call Data

All the roll call matrices and codebooks listed in the links below are in a common format. Questions about the layout of these data should be directed to Keith Poole (ktpoole@uga.edu).
Roll Call Matrices and codebooks for Congresses 109 - 111 were compiled by Jeff Lewis and Keith Poole.
111th House Roll Call Data
111th Senate Roll Call Data
110th House Roll Call Data
110th Senate Roll Call Data
109th House Roll Call Data
109th Senate Roll Call Data
Roll Call Matrices and codebooks for Congresses 102 - 108 were compiled by Keith Poole and Nolan McCarty.
108th House Roll Call Data
108th Senate Roll Call Data
107th House Roll Call Data
107th Senate Roll Call Data
106th House Roll Call Data
106th Senate Roll Call Data
105th House Roll Call Data
105th Senate Roll Call Data
104th House Roll Call Data
104th Senate Roll Call Data
103rd House Roll Call Data
103rd Senate Roll Call Data
102nd House Roll Call Data
102nd Senate Roll Call Data

Roll Call matrices and codebooks for Congresses 1 - 101 were originally compiled by the ICPSR. The versions posted on the pages below are heavily revised from the 1980s originals. The roll call matrices have been reformatted and extensively cleaned and many of the party and ID codes have been corrected. The codebooks have been transformed so that they are fixed-format ASCII files in a standardized format. Questions about the layout of and the corrections made to these data should be directed to Keith Poole (ktpoole@uga.edu).
101st House Roll Call Data
101st Senate Roll Call Data
100th House Roll Call Data
100th Senate Roll Call Data
99th House Roll Call Data
99th Senate Roll Call Data
98th House Roll Call Data
98th Senate Roll Call Data
97th House Roll Call Data
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96th House Roll Call Data
96th Senate Roll Call Data
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91st House Roll Call Data
91st Senate Roll Call Data
90th House Roll Call Data
90th Senate Roll Call Data
89th House Roll Call Data
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88th House Roll Call Data
88th Senate Roll Call Data
87th House Roll Call Data
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86th House Roll Call Data
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83rd House Roll Call Data
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12th House Roll Call Data
12th Senate Roll Call Data
11th House Roll Call Data
11th Senate Roll Call Data
10th House Roll Call Data
10th Senate Roll Call Data
9th House Roll Call Data
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7th House Roll Call Data
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6th House Roll Call Data
6th Senate Roll Call Data
5th House Roll Call Data
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4th House Roll Call Data
4th Senate Roll Call Data
3rd House Roll Call Data
3rd Senate Roll Call Data
2nd House Roll Call Data
2nd Senate Roll Call Data
1st House Roll Call Data
1st Senate Roll Call Data
Non-USA Roll Call Matrices in the *.ORD Format

General Data Collections

STATA files for the American National Election Studies 1952-2008
Interest Group Ratings (1959 - 1981)
Data Used in October 1996 World Politics Article
Data for Friends

Movies and Animated Gifs

Two Dimensional Movie of the 1^st to 110^th Houses and Senates (high resolution, 563 Megabytes!!)
Two Dimensional Movie of the 1^st to 109^th Houses and Senates (high resolution, 718 Megabytes!!)
Two Dimensional Movie of the 1^st to 107^th Houses and Senates (215 Megabytes!!)
Two Dimensional Animated Gif for the 1^st to 107^th Houses and Senates (DW-NOMINATE)
Two Dimensional Animated Gif for the 75^th to 107^th Houses and Senates (Common Space Scores)
One Dimensional Animated Gif for the 46^th to 105^th Houses
Two Dimensional Animated Gif for the 46^th to 105^th Houses
Two Dimensional Animated Gif for the 46^th to 105^th Congresses (House and Senate Simultaneously)

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