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Measuring Bias and Uncertainty in DW-NOMINATE Ideal Point Estimates via the Parametric Bootstrap

  • Royce Carroll (a1), Jeffrey B. Lewis (a2), James Lo (a2), Keith T. Poole (a3) and Howard Rosenthal (a4)...
Abstract

DW-NOMINATE scores for the U.S. Congress are widely used measures of legislators' ideological locations over time. These scores have been used in a large number of studies in political science and closely related fields. In this paper, we extend the work of Lewis and Poole (2004) on the parametric bootstrap to DW-NOMINATE and obtain standard errors for the legislator ideal points. These standard errors are in the range of 1%–4% of the range of DW-NOMINATE coordinates.

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e-mail: jameslo@ucla.edu (corresponding author)
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Authors' note: We thank the National Science Foundation, Rice University, and the San Diego Supercomputer Center for their support. Replication materials are available on the Political Analysis Web site.

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This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

P. J. Dhrymes 1978. Introductory econometrics. New York: Springer-Verlag.

P. J. Dhrymes 1978. Introductory econometrics. New York: Springer-Verlag.

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B. Efron , and R. J. Tibshirani 1993. An introduction to the bootstrap. New York: Chapman and Hall.

J. B. Lewis , and K. T. Poole 2004. Measuring bias and uncertainty in ideal point estimates via the parametric bootstrap. Political Analysis 12: 105–27.

K. T. Poole 2001. The geometry of multidimensional quadratic utility in models of parliamentary roll call voting. Political Analysis 9: 211–26.

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K. T. Poole , and H. Rosenthal 1985. A spatial model for legislative roll call analysis. American Journal of Political Science 29: 357–84.

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K. T. Poole , and H. Rosenthal 1987a. Analysis of congressional coalition patterns: A unidimensional spatial model. Legislative Studies Quarterly 12: 5575.

K. T. Poole , and H. Rosenthal 1987a. Analysis of congressional coalition patterns: A unidimensional spatial model. Legislative Studies Quarterly 12: 5575.

K. T. Poole , and H. Rosenthal 1991. Patterns of congressional voting. American Journal of Political Science 35: 228–78.

K. T. Poole , and H. Rosenthal 1991. Patterns of congressional voting. American Journal of Political Science 35: 228–78.

K. T. Poole , and H. Rosenthal 2001. D-nominate after 10 years: An update to congress: A political-economic history of roll call voting. Legislative Studies Quarterly 26: 529.

K. T. Poole , and H. Rosenthal 2001. D-nominate after 10 years: An update to congress: A political-economic history of roll call voting. Legislative Studies Quarterly 26: 529.

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Political Analysis
  • ISSN: 1047-1987
  • EISSN: 1476-4989
  • URL: /core/journals/political-analysis
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