Court Analytics
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Ideological direction over time
Share of decisions coded conservative vs. liberal, by term (SCDB decisionDirection).
The 5-4 (one-vote-margin) rate
Percent of each term's decisions decided by a single vote.
Issue-area distribution
All decisions, by SCDB issue area.
Majority-opinion leaderboard
Most opinions of the Court authored, 1946–2025.
Disposition of cases
How the Court disposed of the decisions below (SCDB caseDisposition).
Chief-justice eras
Caseload and ideological tilt by Chief.
Laws struck down & precedents overruled
Justice records
Every justice 1946–2025 — participations, share in the majority, and ideological direction.
| Justice | Terms | Cases | % majority | % conservative |
|---|
Precedents overruled
| Term | Case | Citation |
|---|
Most influential precedents
Authority = citation-network PageRank percentile within this database (computed over the full federal + state citation graph); “cited by” counts later Supreme Court decisions here.
| # | Term | Case | Authority | Cited by |
|---|
Justice agreement
Share of joint participations where two justices ended up on the same side (both in majority or both in dissent).
Most aligned
Least aligned
Ideology over time (Martin–Quinn scores)
Term-by-term ideal-point estimates for the current nine justices; negative = liberal, positive = conservative. Martin & Quinn (2002), 2024 release.
The median justice
Median Martin–Quinn score of the sitting justices, by term.
Voting blocs in close cases
Of each term's 6–3 and 5–4 decisions, how many split along the Martin–Quinn ideological line (the minority = the most extreme block on one side)?
| Term | 6–3s | ideological | 5–4s | ideological |
|---|