Lake Research Partners
Graded against the actual result across 37 races (from 41 polls, through 2022).
Head-to-head vs the VotePredictor model
The fair, apples-to-apples test: on the 32 races Lake Research Partners actually polled, how its final poll's margin compared to what the VotePredictor model predicted for those same races.
| Model | Avg miss (pts) | Called right |
|---|---|---|
| Lake Research Partners | 7.05 | 66% |
| VotePredictor | 3.76 | 84% |
VotePredictor aggregates all the pollsters, so it's expected to beat any single one on margin — that's the value of averaging. The honest comparison among forecasters is on the combined board.
Every race (36)
Each race Lake Research Partners polled, scored on its final poll — the call right before the vote — against the actual Dem−Rep result. Click a race for its full detail.
Accuracy by time to election
Lower is better. Time to election runs right (election week) to left (~2 months out).
By the numbers
| Time to election | Polls | Avg miss | vs field | Called right |
|---|---|---|---|---|
| 1–3 wk | 8 | 3.39 | -1.68 | 63% |
| 3–6 wk | 25 | 7.12 | +1.38 | 72% |
| 6–9 wk | 7 | 13.42 | +7.27 | 71% |
vs field is this pollster's average miss minus all pollsters' at the same lead time — green beats the field, redtrails it. Our historical polls reach ~2 months out; earlier polling isn't in the record.
Track record by cycle — getting better?
| Year | Polls | Avg miss | Lean (house effect) |
|---|---|---|---|
| 2002 | 4 | 12.1 | D+12.1 |
| 2004 | 4 | 4.9 | D+4.2 |
| 2006 | 5 | 5.0 | D+1.6 |
| 2012 | 8 | 3.3 | R+0.3 |
| 2014 | 4 | 7.5 | D+3.3 |
| 2018 | 5 | 5.6 | D+5.6 |
| 2020 | 3 | 6.4 | D+5.5 |
Do we credit a pollster for fixing its bias? Each cycle, the model re-estimates every pollster's lean from all its earlier polls (walk-forward) and subtracts it before using the poll. We tested weighting recent cycles more — it doesn't help: a pollster's lean in one cycle barely predicts the next (correlation 0.28), so the swings above are mostly noise, and averaging over more history beats chasing the latest cycle. The all-time estimate we use came out within ~0.5% of the best option.