Measuring Ideology on the Courts

Authored by: Michael A. Bailey

Routledge Handbook of Judicial Behavior

Print publication date:  October  2017
Online publication date:  October  2017

Print ISBN: 9781138913356
eBook ISBN: 9781315691527
Adobe ISBN:


 Download Chapter



Measuring ideology on the courts is important, yet challenging. This chapter discusses various approaches, ranging from calculating percent conservative scores to measures based on sophisticated measurement models, emphasizing two themes. First, scholars should not assume that all ideological measures work in all research contexts. I identify specific instances in which sophisticated measures produce questionable results. Second, ideology on the court is distinctive from ideology among elected officials, particularly on the Supreme Court, not only because justices are influenced by legal factors, but also because the small size of the Court makes the idiosyncratic world views of justices (and median justices in particular) decisive. The result is that the Court’s decisions may lack the ideological coherence more typically observed in Congress. While the task of measuring ideology on the Court may seem technical, it is in fact highly politically relevant and quite unsettled. The final part of this chapter explores the competing and evolving measures of ideology for the Roberts Court.

Search for more...
Back to top

Use of cookies on this website

We are using cookies to provide statistics that help us give you the best experience of our site. You can find out more in our Privacy Policy. By continuing to use the site you are agreeing to our use of cookies.