Hill Research Consultants
Historical accuracy is measured against certified results. Current-cycle records come from the canonical, deduplicated archive and do not by themselves change the sealed forecast.
- Historical polls
- 5
- Mean absolute error
- 5.28percentage points
- Historical bias
- R+1.09
- Represented cycles
- 41998–2008
- Current archive
- 0canonical records
- History span
- Oct 16, 1998through Oct 15, 2008
Known names and relationships
- Known aliases
- No additional reviewed aliases
- Organization type
- Single canonical organization
- Cycles represented
- 1998 · 2000 · 2002 · 2008
5 eligible historical polls is a limited denominator; both MAE and bias may move materially as another cycle is added.
Current-cycle records
Archive source date 2026-09-09 · bundled copy. Archive records may be newer than the sealed forecast; inclusion here does not mean the forecast uses them.
0 shown · 0 total
No record in the currently authorized canonical archive is attached to this identity.
This is not evidence that the pollster released no 2026 polling; the source-audit gaps remain documented.
Eligible historical observations
5 shown · 5 total
| Cycle | Race | Type | Field end | Sample | Poll | Result | Error |
|---|---|---|---|---|---|---|---|
| 2008 | 2008_Sen-G_CO | Sen-G | 2008-10-15 | 600 | D+5.0 | D+10.3 | R+5.3 |
| 2002 | 2002_Sen-G_CO | Sen-G | 2002-11-01 | 400 | R+6.0 | R+4.9 | R+1.1 |
| 2000 | 2000_Pres-G_MI | Pres-G | 2000-10-23 | 550 | R+1.0 | D+5.1 | R+6.1 |
| 1998 | 1998_Gov-G_TX | Gov-G | 1998-10-27 | 501 | R+47.0 | R+37.1 | R+9.9 |
| 1998 | 1998_House-G_US | House-G | 1998-10-16 | 600 | D+3.0 | R+0.9 | D+3.9 |
Method · historical final-three-week D/R general-election rows plus verified historical supplement; min n=5
Definition · bias_D is poll D-R margin minus actual D-R margin; positive overstates Democrats.
A missing sample, sponsor or source is labeled unavailable; it is never reconstructed.
Poll data via VoteHub, used under CC BY 4.0. Poll data from The New York Times, used under CC BY 4.0.