Jeffrey B. Lewis

About

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Research topics

• Political Science
• Computer Science
• Political economy
• Social Science
• Computer Security
• Economics
• Sociology
• Law
• Internet privacy
• Psychology

Selected publications

• poLCA: An R Package for Polytomous Variable Latent Class Analysis

  2015-02-18 · 166 citations

  articleOpen accessSenior author

  poLCA is a software package for the estimation of latent class and latent class regres-sion models for polytomous outcome variables, implemented in the R statistical computing environment. Both models can be called using a single simple command line. The basic latent class model is a finite mixture model in which the component distributions are as-sumed to be multi-way cross-classification tables with all variables mutually independent. The latent class regression model further enables the resea…

  PublisherOA PDF

• Moderates

  American Political Science Review · 2022 · 97 citations

  Moderates are often overlooked in contemporary research on American voters. Many scholars who have examined moderates argue that these individuals are only classified as such due to a lack of political sophistication or conflicted views across issues. We develop a method to distinguish three ways an individual might be classified as moderate: having genuinely moderate views across issues, being inattentive to politics or political surveys, or holding views poorly summarized by a single liberal–c…

  PublisherOA PDFDOI

• Recovering a Basic Space from Issue Scales in<i>R</i>

  Journal of Statistical Software · 2016-01-01 · 87 citations

  articleOpen access

  basicspace is an R package that conducts Aldrich-McKelvey and Blackbox scaling to recover estimates of the underlying latent dimensions of issue scale data. We illustrate several applications of the package to survey data commonly used in the social sciences. Monte Carlo tests demonstrate that the procedure can recover latent dimensions and reproduce the matrix of responses at moderate levels of error and missing data.

  PublisherDOI

• The Structure of Utility in Spatial Models of Voting

  American Journal of Political Science · 2013-05-23 · 68 citations

  articleCorresponding

  Empirical models of spatial voting allow legislators' locations in a policy or ideological space to be inferred from their roll‐call votes. These are typically random utility models where the features of the utility functions other than the ideal points are assumed rather than estimated. In this article, we first consider a model in which legislators' utility functions are allowed to be a mixture of the two most commonly assumed utility functions: the quadratic function and the Gaussian function…

  PublisherDOI

• The new Voteview.com: preserving and continuing Keith Poole’s infrastructure for scholars, students and observers of Congress

  Public Choice · 2018-05-07 · 38 citations

  article
  PublisherDOI

Recent grants

• Collaborative Research on Dynamic Models of Roll Call Voting

  NSF · $182k · 2006–2011

Frequent coauthors

• Gary King

  Harvard University Press

  636 shared

• Kenneth Benoit

  629 shared

• Micah Altman

  Massachusetts Institute of Technology

  629 shared

• Greg Adams

  628 shared

• Russ Mayer

  628 shared

• Bradley Palmquist

  Syracuse University

  628 shared

• Claudine Gay

  628 shared

• Eric Reinhardt

  Emory University

  628 shared

Awards & honors

• President of the Society for Political Methodology

Similar researchers at University of California, Los Angeles

• Anthony Pagdenh-36
• Matt A. Barretoh-32
• Susanne Lohmannh-27