In Ideology and Congress, authors Poole and Rosenthal have analyzed over 13 million individual roll call votes spanning the two centuries since Congress began recording votes in 1789

Preface to Ideology and Congress, Preface to Congress: A Political-Economic History of Roll Call Voting (1997), 1. Introduction: The Liberal/Conservative Structure, 2. The Spatial Model and Congressional Voting, 3. The Spatial Model: Accuracy and Dimensionality, 4. The Spatial Model: Stability, Replacement, and Polarization, 5. Party Realignment in Congress, 6. Issues, Constituent Interests, and the Basic Space, 7. Sophisticated Voting and Agenda Manipulation, 8. Roll Call Voting and Interest Group Ratings, 9. Committees and Roll Calls, 10. Abstention from Roll Call Voting, 11. The NOMINATE Literature, 12. The Unidimensional Congress, References, Index