The following papers are in Adobe Acrobat (*.pdf) format. If you do not have an Adobe Acrobat reader, you may obtain one for free at http://www.adobe.com.


"Does Gerrymandering Cause Polarization?" (with Nolan McCarty and Howard Rosenthal, July 2009)

"The Scientific Status of Geometric Models of Choice." (May, 2009)

"NOMINATE and American Political History: A Primer." by Phil Everson (Swarthmore), Rick Valelly (Swarthmore), and Jim Wiseman (Agnes Smith)

"The Roots of the Polarization of Modern U. S. Politics." (September, 2008)

"Comparing NOMINATE and IDEAL: Points of Difference and Monte Carlo Tests." (with Royce Carroll, Jeffrey B. Lewis, James Lo, and Howard Rosenthal, August 2008)

"Scaling Roll Call Votes With wnominate in R." (with Royce Carroll, Jeffrey B. Lewis, and James Lo, June 2008)

"A Method of Linking Surveys Using Affective 'Signatures' with an Application to Racial/Ethnic Groups in the U. S." (with Marisa A. Abrajano, April 2008)

"Measuring Bias and Uncertainty in DW-NOMINATE Ideal Point Estimates via the Parametric Bootstrap." (with Royce Carroll, Jeffrey B. Lewis, James Lo, and Howard Rosenthal, September 2007)

"Extremism, Intensity, and Perception in Congressional Voting." GSIA Working Paper 33-83-84, March 1984 (With Howard Rosenthal). (This is the 1984 original -- For historical purposes only.)

"The Evolving Influence of Psychometrics in Political Science." (December 2005)

"The Decline and Rise of Party Polarization in Congress During the Twentieth Century." (October 2005)

"The Unidimensional Congress, 1919-84." GSIA Working Paper 44-84-85 (With Howard Rosenthal) (This is the 1985 original -- For historical purposes only.)

Inferring Universals From Grammatical Variation: Multidimensional Scaling for Typological Analysis (with William Croft, 19 July 2004)

Graphs and Tables for "Inferring Universals From Grammatical Variation: Multidimensional Scaling for Typological Analysis" (with William Croft, updated, 2 August 2004)

"Measuring Bias and Uncertainty in Ideal Point Estimates via the Parametric Bootstrap" (with Jeffrey B. Lewis, 26 December 2003)

Political Polarization and Income Inequality With Nolan McCarty and Howard Rosenthal (Revised, 27 January 2003).

Changing Minds? Not in Congress! (Revised, 15 January 2003)

Congressional Party Defection in American History With Tim Nokken (3 December 2002).

On Measuring Partisanship in Roll Call Voting: The U.S. House of Representatives, 1877-1999 (contains Appendix referenced by the published version of the paper) With Gary Cox (29 April 2002).

Appendix B for the Published Version of "The Hunt For Party Discipline in Congress" (referred as part of the published version and omitted to save space) With Nolan McCarty and Howard Rosenthal (10 September 2001).

Proof that if Voting is Perfect in One Dimension, then the First Eigenvector Extracted from the Double-Centered Transformed Agreement Score Matrix has the Same Rank Ordering as the True Data

The Hunt For Party Discipline in Congress With Nolan McCarty and Howard Rosenthal (Revised, 2 January 2001)

Appendix to NonParametric Unfolding of Binary Choice Data (2000 Political Analysis article)

The Geometry of Multidimensional Quadratic Utility in Models of Parliamentary Roll Call Voting (2000 Midwest paper)

D-NOMINATE After 10 Years: A Comparative Update to Congress: A Political-Economic History of Roll Call Voting (1999 APSA paper) with Howard Rosenthal.

NOMINATE: A Short Intellectual History

Non-Parametric Unfolding of Binary Choice Data (1998 APSA paper)

How to Use the Black Box (Updated, 4 August 1998)

Congress and the Territorial Expansion of the United States with Nolan M. McCarty and Howard Rosenthal (Updated, 27 July 1999).

The following papers are in html (*.htm) format.

The Hunt For Party Discipline in Congress (Revised, 2 January 2001)

Appendix to Non-Parametric Unfolding of Binary Choice Data

The Geometry of Multidimensional Quadratic Utility in Models of Parliamentary Roll Call Voting (2000 Midwest paper)

How to Use the Black Box

NOMINATE: A Short Intellectual History

Non-Parametric Analysis of Binary Choice Data

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