Market Research Institute Inc.
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
- 11
- Mean absolute error
- 4.20percentage points
- Historical bias
- D+0.31
- Represented cycles
- 31998–2004
- Current archive
- 0canonical records
- History span
- Oct 22, 1998through Oct 24, 2004
Known names and relationships
- Known aliases
- No additional reviewed aliases
- Organization type
- Single canonical organization
- Cycles represented
- 1998 · 2002 · 2004
11 eligible historical polls across 3 represented cycles passed the published history identity checks. Historical bias is descriptive and is kept separate from sponsor or client affiliation.
Current-cycle records
Archive source date 2026-10-24. 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
11 shown · 11 total
| Cycle | Race | Type | Field end | Sample | Poll | Result | Error |
|---|---|---|---|---|---|---|---|
| 2004 | MO · Senate | Sen-G | 2004-10-24 | 553 | R+17.0 | R+13.3 | R+3.7 |
| 2004 | KS · Senate | Sen-G | 2004-10-24 | 573 | R+33.0 | R+41.7 | D+8.7 |
| 2004 | MO · President | Pres-G | 2004-10-24 | 553 | R+4.0 | R+7.2 | D+3.2 |
| 2004 | KS · President | Pres-G | 2004-10-24 | 573 | R+29.0 | R+25.4 | R+3.6 |
| 2004 | MO · Governor | Gov-G | 2004-10-24 | 500 | R+1.0 | R+3.0 | D+2.0 |
| 2004 | MO-5 · House | House-G | 2004-10-19 | 600 | D+5.0 | D+13.1 | R+8.1 |
| 2004 | KS-3 · House | House-G | 2004-10-19 | 600 | D+12.0 | D+11.5 | D+0.5 |
| 2002 | MO · Senate | Sen-G | 2002-10-27 | 601 | R+5.0 | R+1.1 | R+3.9 |
| 2002 | KS · Governor | Gov-G | 2002-10-26 | 602 | D+9.0 | D+7.8 | D+1.2 |
| 2002 | KS-3 · House | House-G | 2002-10-24 | 602 | D+3.0 | D+3.3 | R+0.3 |
| 1998 | FL · Senate | Sen-G | 1998-10-22 | 670 | D+36.0 | D+24.9 | D+11.1 |
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.