UK OC OK?∗ A Note on Interpreting Optimal Classification Scores for the United Kingdom House of Commons

نویسندگان

  • Arthur Spirling
  • Iain McLean
چکیده

Scholars working on roll-call data for non-US parliament are exhorted to utilize Poole’s (2000) non-parametric Optimal Classification procedure for binary data, but rank orderings arising from application to Westminster are misleading, and certainly not ideological continua. The problem arises from the government-versus-opposition nature of British parliamentary politics and the strategic voting that is entailed therein. Moreover, the goodness of fit statistics for a one dimensional model of House of Commons voting have an ersatz accuracy. Advances in spatial analysis and ideal point estimation will need to consider this problem carefully. ∗We are grateful to David Firth and Keith Poole for comments and data assistance. All errors and omissions remain ours and ours alone. †Department of Political Science, University of Rochester [email protected] ‡Nuffield College Oxford Univesity, [email protected]

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تاریخ انتشار 2006