Sam Wang: prediction track record

Neuroscientist, runs the Princeton Election Consortium

Credibility 58% Leans right 10 years half-life
All-time
57%no decay
Resolved
5
Right
3
Wrong
2
Brier score
0.40coin flip 0.25
Last resolved
3 Nov 2020

Credibility half-life

Sam Wang: credibility half-life chartCredibility of Sam Wang from 4 May 2004 to 14 Oct 2026, with a 10 years half-life. 5 resolved predictions marked on the line. Now 58%.0%25%50%75%100%200520102015202020252 Nov 2004: John Kerry wins the 2004 presidential election. (wrong)4 Nov 2008: Barack Obama wins the 2008 presidential election. (right)6 Nov 2012: Barack Obama wins re-election in 2012. (right)8 Nov 2016: Hillary Clinton wins the 2016 presidential election. (wrong)3 Nov 2020: Joe Biden wins the 2020 presidential election. (right)58%coin flip

Scored 14 Oct 2026. How the score works

Resolved predictions

PredictionMadeResolvedOutcomeEffect on score

Joe Biden wins the 2020 presidential election.

Source: 2020 United States presidential election (Wikipedia)

Right 49% → 59% (+10.0 pts)

Hillary Clinton wins the 2016 presidential election.

Stated chance 99%

The consortium gave Clinton more than a 99% chance. Wang had promised to eat a bug if Trump won 240 electoral votes, and did so on CNN.

Source: Why I ate a bug (Caltech Alumni)

Wrong 62% → 49% (−12.8 pts)

Barack Obama wins re-election in 2012.

Source: How'd we do? (Princeton Election Consortium)

Right 53% → 64% (+10.9 pts)

Barack Obama wins the 2008 presidential election.

Source: How'd we do? (Princeton Election Consortium)

Right 36% → 53% (+17.0 pts)

John Kerry wins the 2004 presidential election.

His poll aggregate pointed to Bush; he overrode it with an assumption about undecided voters and later called that a humbling mistake.

Source: In a hot election, Sam Wang sticks to the math (Princeton Info)

Wrong 50% → 33% (−16.7 pts)

Atom feed of Sam Wang's resolutions · Compare with another figure · Report an error or a missing prediction