Martin-Quinn scores
E602784
Martin-Quinn scores are a widely used statistical measure that estimates the ideological positions of U.S. Supreme Court justices over time based on their voting behavior.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
ideal point estimate
ⓘ
judicial ideology measure ⓘ statistical model ⓘ time-series cross-sectional model ⓘ |
| appliesTo | U.S. Supreme Court justices NERFINISHED ⓘ |
| associatedWith |
UC Berkeley
NERFINISHED
ⓘ
University of Michigan NERFINISHED ⓘ |
| assumes |
cases can be ordered along an ideological dimension
ⓘ
justices have stable preferences within short periods ⓘ |
| basedOn |
Supreme Court voting behavior
ⓘ
case outcomes ⓘ |
| captures | changes in justice ideology over time ⓘ |
| coversPeriod | U.S. Supreme Court terms from 1953 onward ⓘ |
| dataSource | Supreme Court Database NERFINISHED ⓘ |
| developedBy |
Andrew D. Martin
NERFINISHED
ⓘ
Kevin M. Quinn NERFINISHED ⓘ |
| documentedIn | “Dynamic Ideal Point Estimation via Markov Chain Monte Carlo for the U.S. Supreme Court, 1953–1999” NERFINISHED ⓘ |
| estimates |
ideological positions of justices
ⓘ
latent policy preferences ⓘ |
| excludes | many unanimous decisions ⓘ |
| firstPublishedIn | early 2000s ⓘ |
| focusesOn | merits decisions ⓘ |
| hasDimension | one-dimensional ideological scale ⓘ |
| hasOrientation | liberal-conservative ⓘ |
| hasWebsite | https://mqscores.lsa.umich.edu/ ⓘ |
| inputData |
case issue areas
ⓘ
votes in non-unanimous cases ⓘ |
| interpretedAs |
higher values more conservative
ⓘ
lower values more liberal ⓘ |
| output |
posterior mean ideal points
ⓘ
posterior uncertainty intervals ⓘ |
| publishedIn | Political Analysis NERFINISHED ⓘ |
| relatedTo |
Judicial Common Space scores
ⓘ
Segal-Cover scores ⓘ ideal point models ⓘ |
| scaleCentering | Court median in a reference term ⓘ |
| unitOfAnalysis | justice-term ⓘ |
| updated | periodically ⓘ |
| usedBy |
journalists
ⓘ
legal scholars ⓘ political scientists ⓘ |
| usedFor |
comparing ideological positions across terms
ⓘ
measuring Court polarization ⓘ quantitative analysis of the Supreme Court ⓘ studying judicial behavior ⓘ tracking ideological drift of justices ⓘ |
| usesMethod |
Bayesian item response theory
ⓘ
Markov chain Monte Carlo NERFINISHED ⓘ |
| variesOver | time ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.